diff --git a/library/MNCC_Types.ttcn b/library/MNCC_Types.ttcn
index 19af236..157457a 100644
--- a/library/MNCC_Types.ttcn
+++ b/library/MNCC_Types.ttcn
@@ -1922,7 +1922,7 @@
 		return pdu.u.signal.callref;
 	} else  {
 		setverdict(fail, "Unable to determine Callref for MNCC", pdu);
-		self.stop
+		mtc.stop
 	}
 }