--- a/StandardSystemView.st	Fri Feb 21 12:20:48 2020 +0100
+++ b/StandardSystemView.st	Fri Feb 21 15:33:49 2020 +0100
@@ -1606,7 +1606,8 @@
         windowClassNameString := windowNameString asUppercaseFirst.
 
         "/ Also, set _NET_WM_PID
-        self setWindowPid: nil.
+        "/ cg: to nil???
+        gc setWindowPid: nil.
     ] ifFalse:[
         "/ Old code..."
         application notNil ifTrue:[