diff --git a/libs/openzap/mod_openzap/mod_openzap.c b/libs/openzap/mod_openzap/mod_openzap.c
index 10aa079f03..d28a754119 100644
--- a/libs/openzap/mod_openzap/mod_openzap.c
+++ b/libs/openzap/mod_openzap/mod_openzap.c
@@ -441,6 +441,9 @@ static switch_status_t channel_on_hangup(switch_core_session_t *session)
 		{
 			if (tech_pvt->zchan->state != ZAP_CHANNEL_STATE_DOWN && tech_pvt->zchan->state != ZAP_CHANNEL_STATE_TERMINATING) {
 				tech_pvt->zchan->caller_data.hangup_cause = switch_channel_get_cause(channel);
+				if (tech_pvt->zchan->caller_data.hangup_cause < 1 || tech_pvt->zchan->caller_data.hangup_cause > 127) {
+					tech_pvt->zchan->caller_data.hangup_cause = ZAP_CAUSE_DESTINATION_OUT_OF_ORDER;
+				}
 				zap_set_state_locked(tech_pvt->zchan, ZAP_CHANNEL_STATE_HANGUP);
 			}
 		}