diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index 8a3d1b10f6..90193ac63a 100644
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -2135,7 +2135,7 @@ static void parse_gateways(sofia_profile_t *profile, switch_xml_t gateways_tag)
 
 			register_transport = (char *) sofia_glue_transport2str(gateway->register_transport);
 
-			if (contact_params) {
+			if (! zstr(contact_params)) {
 				if (*contact_params == ';') {
 					params = switch_core_sprintf(gateway->pool, "%s;transport=%s;gw=%s", contact_params, register_transport, gateway->name);
 				} else {