diff --git a/include/proto/checks.h b/include/proto/checks.h
index d949175..a0a8329 100644
--- a/include/proto/checks.h
+++ b/include/proto/checks.h
@@ -56,6 +56,12 @@
 void send_email_alert(struct server *s, int priority, const char *format, ...)
 	__attribute__ ((format(printf, 3, 4)));
 
+extern struct action_kw_list tcp_check_keywords;
+static inline void tcp_check_keywords_register(struct action_kw_list *kw_list)
+{
+	LIST_ADDQ(&tcp_check_keywords.list, &kw_list->list);
+}
+
 /* Declared here, but the definitions are in flt_spoe.c */
 int spoe_prepare_healthcheck_request(char **req, int *len);
 int spoe_handle_healthcheck_response(char *frame, size_t size, char *err, int errlen);
diff --git a/include/types/action.h b/include/types/action.h
index 3298770..1a5a594 100644
--- a/include/types/action.h
+++ b/include/types/action.h
@@ -34,6 +34,7 @@
 	ACT_F_TCP_RES_CNT, /* tcp-response content */
 	ACT_F_HTTP_REQ,    /* http-request */
 	ACT_F_HTTP_RES,    /* http-response */
+	ACT_F_TCP_CHK,     /* tcp-check. */
 };
 
 enum act_return {
diff --git a/include/types/checks.h b/include/types/checks.h
index b980faa..d848e6c 100644
--- a/include/types/checks.h
+++ b/include/types/checks.h
@@ -256,12 +256,17 @@
 	int min_recv;                   /* Minimum amount of data before an expect can be applied. (default: -1, ignored) */
 };
 
+struct tcpcheck_action_kw {
+	struct act_rule *rule;
+};
+
 /* possible actions for tcpcheck_rule->action */
 enum tcpcheck_rule_type {
 	TCPCHK_ACT_SEND = 0, /* send action, regular string format */
 	TCPCHK_ACT_EXPECT, /* expect action, either regular or binary string */
 	TCPCHK_ACT_CONNECT, /* connect action, to probe a new port */
 	TCPCHK_ACT_COMMENT, /* no action, simply a comment used for logs */
+	TCPCHK_ACT_ACTION_KW, /* custom registered action_kw rule. */
 };
 
 struct tcpcheck_rule {
@@ -273,6 +278,7 @@
 		struct tcpcheck_connect connect; /* Connect rule. */
 		struct tcpcheck_send send;      /* Send rule. */
 		struct tcpcheck_expect expect;  /* Expected pattern. */
+		struct tcpcheck_action_kw action_kw;  /* Custom action. */
 	};
 };
 
diff --git a/include/types/sample.h b/include/types/sample.h
index e5c2c29..2292b36 100644
--- a/include/types/sample.h
+++ b/include/types/sample.h
@@ -99,6 +99,7 @@
 	SMP_CKP_FE_HRS_HDR,  /* FE HTTP response headers (rules, headers) */
 	SMP_CKP_FE_HRS_BDY,  /* FE HTTP response body */
 	SMP_CKP_FE_LOG_END,  /* FE log at the end of the txn/stream */
+	SMP_CKP_BE_CHK_RUL,  /* BE tcp-check rules */
 	SMP_CKP_ENTRIES /* nothing after this */
 };
 
@@ -164,16 +165,18 @@
 	SMP_VAL_FE_HRS_HDR = 1 << SMP_CKP_FE_HRS_HDR,  /* FE HTTP response headers (rules, headers) */
 	SMP_VAL_FE_HRS_BDY = 1 << SMP_CKP_FE_HRS_BDY,  /* FE HTTP response body */
 	SMP_VAL_FE_LOG_END = 1 << SMP_CKP_FE_LOG_END,  /* FE log at the end of the txn/stream */
+	SMP_VAL_BE_CHK_RUL = 1 << SMP_CKP_BE_CHK_RUL,  /* BE tcp-check rule */
 
 	/* a few combinations to decide what direction to try to fetch (useful for logs) */
 	SMP_VAL_REQUEST    = SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT |
 	                     SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
 	                     SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY |
-	                     SMP_VAL_BE_SET_SRV,
+	                     SMP_VAL_BE_SET_SRV | SMP_VAL_BE_CHK_RUL,
 
 	SMP_VAL_RESPONSE   = SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR |
 	                     SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT |
-	                     SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END,
+	                     SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END |
+	                     SMP_VAL_BE_CHK_RUL,
 };
 
 extern const unsigned int fetch_cap[SMP_SRC_ENTRIES];
diff --git a/src/checks.c b/src/checks.c
index 9423e2d..5e147b8 100644
--- a/src/checks.c
+++ b/src/checks.c
@@ -43,6 +43,7 @@
 #include <types/dns.h>
 #include <types/stats.h>
 
+#include <proto/action.h>
 #include <proto/backend.h>
 #include <proto/checks.h>
 #include <proto/stats.h>
@@ -1559,7 +1560,7 @@
 	struct tcpcheck_rule *r;
 
 	list_for_each_entry(r, list, list) {
-		if (r->action != TCPCHK_ACT_COMMENT)
+		if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
 			return r;
 	}
 	return NULL;
@@ -1578,7 +1579,7 @@
 
 	r = LIST_NEXT(&start->list, typeof(r), list);
 	list_for_each_entry_from(r, list, list) {
-		if (r->action != TCPCHK_ACT_COMMENT)
+		if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
 			return r;
 	}
 	return NULL;
@@ -3421,6 +3422,9 @@
 	case TCPCHK_ACT_CONNECT:
 	case TCPCHK_ACT_COMMENT:
 		break;
+	case TCPCHK_ACT_ACTION_KW:
+		free(rule->action_kw.rule);
+		break;
 	}
 
 	if (in_pool)
@@ -3983,6 +3987,56 @@
 REGISTER_SERVER_DEINIT(deinit_srv_check);
 REGISTER_SERVER_DEINIT(deinit_srv_agent_check);
 
+struct action_kw_list tcp_check_keywords = {
+	.list = LIST_HEAD_INIT(tcp_check_keywords.list),
+};
+
+/* Return the struct action_kw associated to a keyword */
+static struct action_kw *action_kw_tcp_check_lookup(const char *kw)
+{
+	return action_lookup(&tcp_check_keywords.list, kw);
+}
+
+static void action_kw_tcp_check_build_list(struct buffer *chk)
+{
+	action_build_list(&tcp_check_keywords.list, chk);
+}
+
+/* Create a tcp-check rule resulting from parsing a custom keyword. */
+static struct tcpcheck_rule *parse_tcpcheck_action(char **args, int cur_arg, struct proxy *px,
+						   struct list *rules, struct action_kw *kw, char **errmsg)
+{
+	struct tcpcheck_rule *chk = NULL;
+	struct act_rule *actrule = NULL;
+
+	actrule = calloc(1, sizeof(*actrule));
+	if (!actrule) {
+		memprintf(errmsg, "out of memory");
+		goto error;
+	}
+	actrule->kw = kw;
+	actrule->from = ACT_F_TCP_CHK;
+
+	cur_arg++;
+	if (kw->parse((const char **)args, &cur_arg, px, actrule, errmsg) == ACT_RET_PRS_ERR) {
+		memprintf(errmsg, "'%s' : %s", kw->kw, *errmsg);
+		goto error;
+	}
+
+	chk = calloc(1, sizeof(*chk));
+	if (!chk) {
+		memprintf(errmsg, "out of memory");
+		goto error;
+	}
+	chk->action = TCPCHK_ACT_ACTION_KW;
+	chk->action_kw.rule = actrule;
+	return chk;
+
+  error:
+	free(actrule);
+	return NULL;
+}
+
 static struct tcpcheck_rule *parse_tcpcheck_connect(char **args, int cur_arg, struct proxy *px, struct list *rules,
 						    char **errmsg)
 {
@@ -3992,11 +4046,13 @@
 	long port = 0;
 
 	list_for_each_entry(chk, rules, list) {
-		if (chk->action != TCPCHK_ACT_COMMENT)
+		if (chk->action != TCPCHK_ACT_COMMENT && chk->action != TCPCHK_ACT_ACTION_KW)
 			break;
 	}
 	if (&chk->list != rules && chk->action != TCPCHK_ACT_CONNECT) {
-		memprintf(errmsg, "first step MUST also be a 'connect' when there is a 'connect' step in the tcp-check ruleset");
+		memprintf(errmsg, "first step MUST also be a 'connect', "
+			  "optionnaly preceded by a 'set-var', an 'unset-var' or a 'comment', "
+			  "when there is a 'connect' step in the tcp-check ruleset");
 		goto error;
 	}
 
@@ -4367,9 +4423,16 @@
 	else if (strcmp(args[cur_arg], "comment") == 0)
 		chk = parse_tcpcheck_comment(args, cur_arg, rules, errmsg);
 	else {
-		memprintf(errmsg, "'%s %s' only supports 'comment', 'connect', 'send', 'send-binary' or 'expect'.",
-			  args[0], args[1]);
-		goto error;
+		struct action_kw *kw = action_kw_tcp_check_lookup(args[cur_arg]);
+
+		if (!kw) {
+			action_kw_tcp_check_build_list(&trash);
+			memprintf(errmsg, "'%s' only supports 'comment', 'connect', 'send', 'send-binary', 'expect'"
+				  "%s%s. but got '%s'",
+				  args[0], (*trash.area ? ", " : ""), trash.area, args[1]);
+			goto error;
+		}
+		chk = parse_tcpcheck_action(args, cur_arg, curpx, rules, kw, errmsg);
 	}
 
 	if (!chk) {
diff --git a/src/sample.c b/src/sample.c
index d602887..6cf805a 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -73,7 +73,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL),
 
 	[SMP_SRC_LISTN] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -81,7 +81,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_FTEND] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -89,7 +89,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_L4CLI] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -97,7 +97,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL),
 
 	[SMP_SRC_L5CLI] = (SMP_VAL___________ | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -105,7 +105,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_TRACK] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -113,7 +113,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_L6REQ] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -121,7 +121,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
-	                   SMP_VAL___________),
+	                   SMP_VAL___________ | SMP_VAL___________),
 
 	[SMP_SRC_HRQHV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -129,7 +129,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
-	                   SMP_VAL___________),
+	                   SMP_VAL___________ | SMP_VAL___________),
 
 	[SMP_SRC_HRQHP] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_REQ_CNT |
 	                   SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -137,7 +137,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_HRQBO] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK |
@@ -145,7 +145,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
-	                   SMP_VAL___________),
+	                   SMP_VAL___________ | SMP_VAL___________),
 
 	[SMP_SRC_BKEND] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -153,7 +153,7 @@
 	                   SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL),
 
 	[SMP_SRC_SERVR] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -161,7 +161,7 @@
 	                   SMP_VAL___________ | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL),
 
 	[SMP_SRC_L4SRV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -169,7 +169,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL),
 
 	[SMP_SRC_L5SRV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -177,7 +177,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL),
 
 	[SMP_SRC_L6RES] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -185,7 +185,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL___________),
+	                   SMP_VAL___________ | SMP_VAL___________),
 
 	[SMP_SRC_HRSHV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -193,7 +193,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL___________),
+	                   SMP_VAL___________ | SMP_VAL___________),
 
 	[SMP_SRC_HRSHP] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -201,7 +201,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT |
 	                   SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_HRSBO] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -209,7 +209,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL |
 	                   SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY |
-	                   SMP_VAL___________),
+	                   SMP_VAL___________ | SMP_VAL___________),
 
 	[SMP_SRC_RQFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -217,7 +217,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_RSFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -225,7 +225,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_TXFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -233,7 +233,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 
 	[SMP_SRC_SSFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
@@ -241,7 +241,7 @@
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
 	                   SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ |
-	                   SMP_VAL_FE_LOG_END),
+	                   SMP_VAL_FE_LOG_END | SMP_VAL___________),
 };
 
 static const char *fetch_src_names[SMP_SRC_ENTRIES] = {
@@ -289,6 +289,7 @@
 	[SMP_CKP_FE_HRS_HDR] = "frontend http-response header rule",
 	[SMP_CKP_FE_HRS_BDY] = "frontend http-response body rule",
 	[SMP_CKP_FE_LOG_END] = "logs",
+	[SMP_CKP_BE_CHK_RUL] = "backend tcp-check rule",
 };
 
 /* This function returns the type of the data returned by the sample_expr.
diff --git a/src/vars.c b/src/vars.c
index 0b7b990..7f3d2d0 100644
--- a/src/vars.c
+++ b/src/vars.c
@@ -788,6 +788,7 @@
 	case ACT_F_TCP_RES_CNT: flags = SMP_VAL_BE_RES_CNT; break;
 	case ACT_F_HTTP_REQ:    flags = SMP_VAL_FE_HRQ_HDR; break;
 	case ACT_F_HTTP_RES:    flags = SMP_VAL_BE_HRS_HDR; break;
+	case ACT_F_TCP_CHK:     flags = SMP_VAL_BE_CHK_RUL; break;
 	default:
 		memprintf(err,
 			  "internal error, unexpected rule->from=%d, please report this bug!",
@@ -903,6 +904,14 @@
 
 INITCALL1(STG_REGISTER, tcp_res_cont_keywords_register, &tcp_res_kws);
 
+static struct action_kw_list tcp_check_kws = {ILH, {
+	{ "set-var",   parse_store, 1 },
+	{ "unset-var", parse_store, 1 },
+	{ /* END */ }
+}};
+
+INITCALL1(STG_REGISTER, tcp_check_keywords_register, &tcp_check_kws);
+
 static struct action_kw_list http_req_kws = { { }, {
 	{ "set-var",   parse_store, 1 },
 	{ "unset-var", parse_store, 1 },