Index: libcfa/src/concurrency/monitor.hfa
===================================================================
--- libcfa/src/concurrency/monitor.hfa	(revision 44f09ea7ae6e9221248765aad89a51ef8e40f7ad)
+++ libcfa/src/concurrency/monitor.hfa	(revision e0b8d66dfb2016ccf7acf85e3c17a5038866a37e)
@@ -61,5 +61,5 @@
 static inline forall( T & | sized(T) | { void ^?{}( T & mutex ); } )
 void delete( T * th ) {
-	^(*th){};
+	if(th) ^(*th){};
 	free( th );
 }