--- a/WindowSensor.st	Sun Aug 11 14:27:31 2019 +0200
+++ b/WindowSensor.st	Mon Aug 12 17:28:57 2019 +0200
@@ -1,3 +1,5 @@
+"{ Encoding: utf8 }"
+
 "
  COPYRIGHT (c) 1993 by Claus Gittinger
               All Rights Reserved
@@ -2574,6 +2576,14 @@
 
 !WindowSensor methodsFor:'event simulation'!
 
+enqueueMessage:selector for:someone
+    "if such a message is already in the queue, ignore it.
+     Otherwise push it as an event, to be handled when my thread is
+     back in the event loop."
+     
+    self enqueueMessage:selector for:someone arguments:nil
+!
+
 enqueueMessage:selector for:someone arguments:argList
     "if such a message is already in the queue, ignore it.
      Otherwise push it as an event, to be handled when my thread is