diff --git a/libs/freetdm/mod_openzap/mod_openzap.c b/libs/freetdm/mod_openzap/mod_openzap.c
index 86a16f72d3..a74d3a26f6 100644
--- a/libs/freetdm/mod_openzap/mod_openzap.c
+++ b/libs/freetdm/mod_openzap/mod_openzap.c
@@ -163,7 +163,7 @@ static void stop_hold(switch_core_session_t *session_a, const char *uuid)
 			switch_channel_clear_flag(channel_a, CF_HOLD);
 		} else {
 			switch_channel_stop_broadcast(channel);
-			switch_channel_wait_for_flag(channel, CF_BROADCAST, SWITCH_FALSE, 2000);
+			switch_channel_wait_for_flag(channel, CF_BROADCAST, SWITCH_FALSE, 2000, NULL);
 		}
 
 		switch_core_session_rwunlock(session);