diff --git a/include/types/action.h b/include/types/action.h
index 5cfcb57..570710b 100644
--- a/include/types/action.h
+++ b/include/types/action.h
@@ -75,6 +75,7 @@
 			const char *name;
 			enum vars_scope scope;
 		} vars;
+		struct track_ctr_prm trk_ctr;
 		struct {
 			void *p[4];
 		} act;                         /* generic pointers to be used by custom actions */
@@ -82,7 +83,6 @@
 
 	union {
 		struct capture_prm cap;
-		struct track_ctr_prm trk_ctr;
 	} act_prm;
 };
 
diff --git a/src/cfgparse.c b/src/cfgparse.c
index befecc2..8e7830e 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -7539,31 +7539,31 @@
 			if (trule->action < TCP_ACT_TRK_SC0 || trule->action > TCP_ACT_TRK_SCMAX)
 				continue;
 
-			if (trule->act_prm.trk_ctr.table.n)
-				target = proxy_tbl_by_name(trule->act_prm.trk_ctr.table.n);
+			if (trule->arg.trk_ctr.table.n)
+				target = proxy_tbl_by_name(trule->arg.trk_ctr.table.n);
 			else
 				target = curproxy;
 
 			if (!target) {
 				Alert("Proxy '%s': unable to find table '%s' referenced by track-sc%d.\n",
-				      curproxy->id, trule->act_prm.trk_ctr.table.n,
+				      curproxy->id, trule->arg.trk_ctr.table.n,
 				      tcp_trk_idx(trule->action));
 				cfgerr++;
 			}
 			else if (target->table.size == 0) {
 				Alert("Proxy '%s': table '%s' used but not configured.\n",
-				      curproxy->id, trule->act_prm.trk_ctr.table.n ? trule->act_prm.trk_ctr.table.n : curproxy->id);
+				      curproxy->id, trule->arg.trk_ctr.table.n ? trule->arg.trk_ctr.table.n : curproxy->id);
 				cfgerr++;
 			}
-			else if (!stktable_compatible_sample(trule->act_prm.trk_ctr.expr,  target->table.type)) {
+			else if (!stktable_compatible_sample(trule->arg.trk_ctr.expr,  target->table.type)) {
 				Alert("Proxy '%s': stick-table '%s' uses a type incompatible with the 'track-sc%d' rule.\n",
-				      curproxy->id, trule->act_prm.trk_ctr.table.n ? trule->act_prm.trk_ctr.table.n : curproxy->id,
+				      curproxy->id, trule->arg.trk_ctr.table.n ? trule->arg.trk_ctr.table.n : curproxy->id,
 				      tcp_trk_idx(trule->action));
 				cfgerr++;
 			}
 			else {
-				free(trule->act_prm.trk_ctr.table.n);
-				trule->act_prm.trk_ctr.table.t = &target->table;
+				free(trule->arg.trk_ctr.table.n);
+				trule->arg.trk_ctr.table.t = &target->table;
 				/* Note: if we decide to enhance the track-sc syntax, we may be able
 				 * to pass a list of counters to track and allocate them right here using
 				 * stktable_alloc_data_type().
@@ -7578,31 +7578,31 @@
 			if (trule->action < TCP_ACT_TRK_SC0 || trule->action > TCP_ACT_TRK_SCMAX)
 				continue;
 
-			if (trule->act_prm.trk_ctr.table.n)
-				target = proxy_tbl_by_name(trule->act_prm.trk_ctr.table.n);
+			if (trule->arg.trk_ctr.table.n)
+				target = proxy_tbl_by_name(trule->arg.trk_ctr.table.n);
 			else
 				target = curproxy;
 
 			if (!target) {
 				Alert("Proxy '%s': unable to find table '%s' referenced by track-sc%d.\n",
-				      curproxy->id, trule->act_prm.trk_ctr.table.n,
+				      curproxy->id, trule->arg.trk_ctr.table.n,
 				      tcp_trk_idx(trule->action));
 				cfgerr++;
 			}
 			else if (target->table.size == 0) {
 				Alert("Proxy '%s': table '%s' used but not configured.\n",
-				      curproxy->id, trule->act_prm.trk_ctr.table.n ? trule->act_prm.trk_ctr.table.n : curproxy->id);
+				      curproxy->id, trule->arg.trk_ctr.table.n ? trule->arg.trk_ctr.table.n : curproxy->id);
 				cfgerr++;
 			}
-			else if (!stktable_compatible_sample(trule->act_prm.trk_ctr.expr,  target->table.type)) {
+			else if (!stktable_compatible_sample(trule->arg.trk_ctr.expr,  target->table.type)) {
 				Alert("Proxy '%s': stick-table '%s' uses a type incompatible with the 'track-sc%d' rule.\n",
-				      curproxy->id, trule->act_prm.trk_ctr.table.n ? trule->act_prm.trk_ctr.table.n : curproxy->id,
+				      curproxy->id, trule->arg.trk_ctr.table.n ? trule->arg.trk_ctr.table.n : curproxy->id,
 				      tcp_trk_idx(trule->action));
 				cfgerr++;
 			}
 			else {
-				free(trule->act_prm.trk_ctr.table.n);
-				trule->act_prm.trk_ctr.table.t = &target->table;
+				free(trule->arg.trk_ctr.table.n);
+				trule->arg.trk_ctr.table.t = &target->table;
 				/* Note: if we decide to enhance the track-sc syntax, we may be able
 				 * to pass a list of counters to track and allocate them right here using
 				 * stktable_alloc_data_type().
@@ -7617,31 +7617,31 @@
 			if (hrqrule->action < HTTP_REQ_ACT_TRK_SC0 || hrqrule->action > HTTP_REQ_ACT_TRK_SCMAX)
 				continue;
 
-			if (hrqrule->act_prm.trk_ctr.table.n)
-				target = proxy_tbl_by_name(hrqrule->act_prm.trk_ctr.table.n);
+			if (hrqrule->arg.trk_ctr.table.n)
+				target = proxy_tbl_by_name(hrqrule->arg.trk_ctr.table.n);
 			else
 				target = curproxy;
 
 			if (!target) {
 				Alert("Proxy '%s': unable to find table '%s' referenced by track-sc%d.\n",
-				      curproxy->id, hrqrule->act_prm.trk_ctr.table.n,
+				      curproxy->id, hrqrule->arg.trk_ctr.table.n,
 				      http_req_trk_idx(hrqrule->action));
 				cfgerr++;
 			}
 			else if (target->table.size == 0) {
 				Alert("Proxy '%s': table '%s' used but not configured.\n",
-				      curproxy->id, hrqrule->act_prm.trk_ctr.table.n ? hrqrule->act_prm.trk_ctr.table.n : curproxy->id);
+				      curproxy->id, hrqrule->arg.trk_ctr.table.n ? hrqrule->arg.trk_ctr.table.n : curproxy->id);
 				cfgerr++;
 			}
-			else if (!stktable_compatible_sample(hrqrule->act_prm.trk_ctr.expr,  target->table.type)) {
+			else if (!stktable_compatible_sample(hrqrule->arg.trk_ctr.expr,  target->table.type)) {
 				Alert("Proxy '%s': stick-table '%s' uses a type incompatible with the 'track-sc%d' rule.\n",
-				      curproxy->id, hrqrule->act_prm.trk_ctr.table.n ? hrqrule->act_prm.trk_ctr.table.n : curproxy->id,
+				      curproxy->id, hrqrule->arg.trk_ctr.table.n ? hrqrule->arg.trk_ctr.table.n : curproxy->id,
 				      http_req_trk_idx(hrqrule->action));
 				cfgerr++;
 			}
 			else {
-				free(hrqrule->act_prm.trk_ctr.table.n);
-				hrqrule->act_prm.trk_ctr.table.t = &target->table;
+				free(hrqrule->arg.trk_ctr.table.n);
+				hrqrule->arg.trk_ctr.table.t = &target->table;
 				/* Note: if we decide to enhance the track-sc syntax, we may be able
 				 * to pass a list of counters to track and allocate them right here using
 				 * stktable_alloc_data_type().
@@ -8229,7 +8229,7 @@
 				    !(trule->act_prm.cap.expr->fetch->val & SMP_VAL_FE_SES_ACC))
 					break;
 				if  ((trule->action >= TCP_ACT_TRK_SC0 && trule->action <= TCP_ACT_TRK_SCMAX) &&
-				     !(trule->act_prm.trk_ctr.expr->fetch->val & SMP_VAL_FE_SES_ACC))
+				     !(trule->arg.trk_ctr.expr->fetch->val & SMP_VAL_FE_SES_ACC))
 					break;
 			}
 
diff --git a/src/proto_http.c b/src/proto_http.c
index 5214d87..aa01361 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -3652,8 +3652,8 @@
 				struct stktable_key *key;
 				void *ptr;
 
-				t = rule->act_prm.trk_ctr.table.t;
-				key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL, rule->act_prm.trk_ctr.expr, NULL);
+				t = rule->arg.trk_ctr.table.t;
+				key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL, rule->arg.trk_ctr.expr, NULL);
 
 				if (key && (ts = stktable_get_entry(t, key))) {
 					stream_track_stkctr(&s->stkctr[http_req_trk_idx(rule->action)], t, ts);
@@ -9173,10 +9173,10 @@
 				goto out_err;
 			}
 			/* we copy the table name for now, it will be resolved later */
-			rule->act_prm.trk_ctr.table.n = strdup(args[cur_arg]);
+			rule->arg.trk_ctr.table.n = strdup(args[cur_arg]);
 			cur_arg++;
 		}
-		rule->act_prm.trk_ctr.expr = expr;
+		rule->arg.trk_ctr.expr = expr;
 		rule->action = HTTP_REQ_ACT_TRK_SC0 + args[0][8] - '0';
 	} else if (strcmp(args[0], "redirect") == 0) {
 		struct redirect_rule *redir;
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index 34f936b..e95ca8c 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -1190,8 +1190,8 @@
 				if (stkctr_entry(&s->stkctr[tcp_trk_idx(rule->action)]))
 					continue;
 
-				t = rule->act_prm.trk_ctr.table.t;
-				key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | partial, rule->act_prm.trk_ctr.expr, &smp);
+				t = rule->arg.trk_ctr.table.t;
+				key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | partial, rule->arg.trk_ctr.expr, &smp);
 
 				if ((smp.flags & SMP_F_MAY_CHANGE) && !(partial & SMP_OPT_FINAL))
 					goto missing_data; /* key might appear later */
@@ -1428,8 +1428,8 @@
 				if (stkctr_entry(&sess->stkctr[tcp_trk_idx(rule->action)]))
 					continue;
 
-				t = rule->act_prm.trk_ctr.table.t;
-				key = stktable_fetch_key(t, sess->fe, sess, NULL, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->act_prm.trk_ctr.expr, NULL);
+				t = rule->arg.trk_ctr.table.t;
+				key = stktable_fetch_key(t, sess->fe, sess, NULL, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->arg.trk_ctr.expr, NULL);
 
 				if (key && (ts = stktable_get_entry(t, key)))
 					stream_track_stkctr(&sess->stkctr[tcp_trk_idx(rule->action)], t, ts);
@@ -1657,10 +1657,10 @@
 				return -1;
 			}
 			/* we copy the table name for now, it will be resolved later */
-			rule->act_prm.trk_ctr.table.n = strdup(args[arg]);
+			rule->arg.trk_ctr.table.n = strdup(args[arg]);
 			arg++;
 		}
-		rule->act_prm.trk_ctr.expr = expr;
+		rule->arg.trk_ctr.expr = expr;
 		rule->action = TCP_ACT_TRK_SC0 + args[kw][8] - '0';
 	}
 	else if (strcmp(args[arg], "expect-proxy") == 0) {