diff --git a/src/mod/endpoints/mod_sofia/sofia_reg.c b/src/mod/endpoints/mod_sofia/sofia_reg.c
index 5d5a93f5b3..7aa06dbbbd 100644
--- a/src/mod/endpoints/mod_sofia/sofia_reg.c
+++ b/src/mod/endpoints/mod_sofia/sofia_reg.c
@@ -311,7 +311,9 @@ void sofia_reg_check_gateway(sofia_profile_t *profile, time_t now)
 
 			sofia_reg_new_handle(gateway_ptr, now ? 1 : 0);
 
-			user_via = sofia_glue_create_external_via(NULL, gateway_ptr->profile, gateway_ptr->register_transport);
+			if (sofia_glue_check_nat(gateway_ptr->profile, gateway_ptr->register_proxy)) {
+				user_via = sofia_glue_create_external_via(NULL, gateway_ptr->profile, gateway_ptr->register_transport);
+			}
 
 			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Registering %s\n", gateway_ptr->name);