diff --git a/src/cfgparse-listen.c b/src/cfgparse-listen.c
index f513207e6..f8330a6e0 100644
--- a/src/cfgparse-listen.c
+++ b/src/cfgparse-listen.c
@@ -1315,6 +1315,13 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int kwm)
 		if (warnifnotcap(curproxy, PR_CAP_BE, file, linenum, args[0], NULL))
 			err_code |= ERR_WARN;
 
+		if (curproxy->mode != PR_MODE_TCP && curproxy->mode != PR_MODE_HTTP) {
+			ha_alert("parsing [%s:%d] : '%s' requires TCP or HTTP mode.\n",
+				 file, linenum, args[0]);
+			err_code |= ERR_ALERT | ERR_FATAL;
+			goto out;
+		}
+
 		if (!*args[1]) {
 			ha_alert("parsing [%s:%d] : '%s' requires a header string.\n",
 				 file, linenum, args[0]);