diff --git a/libs/openzap/mod_openzap/mod_openzap.c b/libs/openzap/mod_openzap/mod_openzap.c
index 8d3c39c4f3..25b54dc22f 100644
--- a/libs/openzap/mod_openzap/mod_openzap.c
+++ b/libs/openzap/mod_openzap/mod_openzap.c
@@ -438,7 +438,7 @@ static switch_status_t channel_on_hangup(switch_core_session_t *session)
 	case ZAP_CHAN_TYPE_B:
 		{
 			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);
+				tech_pvt->zchan->caller_data.hangup_cause = switch_channel_get_cause_q850(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;
 				}