diff --git a/src/sipevent/listen.c b/src/sipevent/listen.c
index c18a835..b2d4e78 100644
--- a/src/sipevent/listen.c
+++ b/src/sipevent/listen.c
@@ -217,6 +217,9 @@ static void notify_handler(struct sipevent_sock *sock,
 		break;
 	}
 
+	if (sub->terminated)
+		return;
+
 	mem_ref(sub);
 	sub->notifyh(msg, sub->arg);
 	nrefs = mem_nrefs(sub);