diff --git a/Documentation/ChangeLog b/Documentation/ChangeLog
index fcb9a51..7c02328 100644
--- a/Documentation/ChangeLog
+++ b/Documentation/ChangeLog
@@ -1,3 +1,7 @@
+2005-07-03 Serg Stoyan <stoyan255@ukr.net>
+
+	* Library/PCButton: (mouseMoved:) check if ttWindow is not nil.
+	
 2005-07-01 Serg Stoyan <stoyan255@ukr.net>
 
 	* Resources/Preferences.gorm: Fixed name of preferences panel. 
diff --git a/Library/PCButton.m b/Library/PCButton.m
index eab9ca4..852f039 100644
--- a/Library/PCButton.m
+++ b/Library/PCButton.m
@@ -262,6 +262,11 @@
   NSPoint origin;
 
 //  NSLog(@"mouseMoved");
+  if (ttWindow == nil)
+    {
+      return;
+    }
+
   mouseLocation = [NSEvent mouseLocation];
   
   origin = NSMakePoint(mouseLocation.x + 8,