diff --git a/libs/freetdm/mod_openzap/mod_openzap.c b/libs/freetdm/mod_openzap/mod_openzap.c
index 49009a1109..c9b200fa2f 100644
--- a/libs/freetdm/mod_openzap/mod_openzap.c
+++ b/libs/freetdm/mod_openzap/mod_openzap.c
@@ -999,7 +999,7 @@ static switch_call_cause_t channel_outgoing_channel(switch_core_session_t *sessi
 	
 	if (status != ZAP_SUCCESS) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No channels available\n");
-		return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
+		return SWITCH_CAUSE_NORMAL_CIRCUIT_CONGESTION;
 	}
 
 	zap_channel_clear_vars(zchan);