diff --git a/src/cfgparse-listen.c b/src/cfgparse-listen.c
index 1b28fbd8e..eac047051 100644
--- a/src/cfgparse-listen.c
+++ b/src/cfgparse-listen.c
@@ -1365,7 +1365,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 		if (curproxy->cap & PR_CAP_BE)
 			where |= SMP_VAL_BE_HRQ_HDR;
 		err_code |= warnif_cond_conflicts(rule->cond, where, &errmsg);
-		if (err_code)
+		if (errmsg && *errmsg)
 			ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 
 		LIST_APPEND(&curproxy->http_req_rules, &rule->list);
@@ -1400,7 +1400,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 		if (curproxy->cap & PR_CAP_BE)
 			where |= SMP_VAL_BE_HRS_HDR;
 		err_code |= warnif_cond_conflicts(rule->cond, where, &errmsg);
-		if (err_code)
+		if (errmsg && *errmsg)
 			ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 
 		LIST_APPEND(&curproxy->http_res_rules, &rule->list);
@@ -1434,7 +1434,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 		if (curproxy->cap & PR_CAP_BE)
 			where |= SMP_VAL_BE_HRS_HDR;
 		err_code |= warnif_cond_conflicts(rule->cond, where, &errmsg);
-		if (err_code)
+		if (errmsg && *errmsg)
 			ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 
 		LIST_APPEND(&curproxy->http_after_res_rules, &rule->list);
@@ -1498,7 +1498,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 		if (curproxy->cap & PR_CAP_BE)
 			where |= SMP_VAL_BE_HRQ_HDR;
 		err_code |= warnif_cond_conflicts(rule->cond, where, &errmsg);
-		if (err_code)
+		if (errmsg && *errmsg)
 			ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 	}
 	else if (strcmp(args[0], "use_backend") == 0) {
@@ -1528,7 +1528,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 			}
 
 			err_code |= warnif_cond_conflicts(cond, SMP_VAL_FE_SET_BCK, &errmsg);
-			if (err_code)
+			if (errmsg && *errmsg)
 				ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 		}
 		else if (*args[2]) {
@@ -1591,7 +1591,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 		}
 
 		err_code |= warnif_cond_conflicts(cond, SMP_VAL_BE_SET_SRV, &errmsg);
-		if (err_code)
+		if (errmsg && *errmsg)
 			ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 
 		rule = calloc(1, sizeof(*rule));
@@ -1646,7 +1646,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 		 * where force-persist is applied.
 		 */
 		err_code |= warnif_cond_conflicts(cond, SMP_VAL_BE_REQ_CNT, &errmsg);
-		if (err_code)
+		if (errmsg && *errmsg)
 			ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 
 		rule = calloc(1, sizeof(*rule));
@@ -1814,7 +1814,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 			err_code |= warnif_cond_conflicts(cond, SMP_VAL_BE_STO_RUL, &errmsg);
 		else
 			err_code |= warnif_cond_conflicts(cond, SMP_VAL_BE_SET_SRV, &errmsg);
-		if (err_code)
+		if (errmsg && *errmsg)
 			ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 
 		rule = calloc(1, sizeof(*rule));
@@ -1872,7 +1872,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 			if (curproxy->cap & PR_CAP_BE)
 				where |= SMP_VAL_BE_HRQ_HDR;
 			err_code |= warnif_cond_conflicts(cond, where, &errmsg);
-			if (err_code)
+			if (errmsg && *errmsg)
 				ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 
 			rule = calloc(1, sizeof(*rule));
@@ -1952,7 +1952,7 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 			if (curproxy->cap & PR_CAP_BE)
 				where |= SMP_VAL_BE_HRQ_HDR;
 			err_code |= warnif_cond_conflicts(rule->cond, where, &errmsg);
-			if (err_code)
+			if (errmsg && *errmsg)
 				ha_warning("parsing [%s:%d] : '%s.\n'", file, linenum, errmsg);
 			LIST_APPEND(&curproxy->uri_auth->http_req_rules, &rule->list);