diff --git a/src/cfgparse.c b/src/cfgparse.c
index 13fda2d96..32b4cb366 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -3776,6 +3776,23 @@ out_uri_auth_compat:
 		list_for_each_entry(bind_conf, &curproxy->conf.bind, by_fe) {
 			int mode = (1 << (curproxy->mode == PR_MODE_HTTP));
 			const struct mux_proto_list *mux_ent;
+			const struct listener *l;
+			int types = 0;
+
+			/* check that the mux is compatible with all listeners'
+			 * protocol types (dgram or stream).
+			 */
+			list_for_each_entry(l, &bind_conf->listeners, by_bind)
+				types |= 1 << l->rx.proto->proto_type;
+
+			if (atleast2(types)) {
+				ha_alert("%s '%s' : cannot mix datagram and stream protocols "
+					 "for 'bind %s' at [%s:%d].\n",
+					 proxy_type_str(curproxy), curproxy->id,
+					 bind_conf->arg, bind_conf->file, bind_conf->line);
+				cfgerr++;
+				continue;
+			}
 
 			if (!bind_conf->mux_proto)
 				continue;