@@ -428,11 +428,11 @@
 	OF_ENSURE(write(_cancelFD[1], "", 1) > 0);
 #elif defined(OF_AMIGAOS)
 	Forbid();
 
 	if (_waitingTask != NULL) {
-		Signal(_waitingTask, (1 << _cancelSignal));
+		Signal(_waitingTask, (1ul << _cancelSignal));
 		_waitingTask = NULL;
 	}
 
 	Permit();
 #elif defined(OF_WII)