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];