diff --git a/clients/nitrogen/nitrogenclient.cpp b/clients/nitrogen/nitrogenclient.cpp
index 0eefdeb588..3b2a5cb747 100644
--- a/clients/nitrogen/nitrogenclient.cpp
+++ b/clients/nitrogen/nitrogenclient.cpp
@@ -124,6 +124,18 @@ namespace Nitrogen
 
   }
 
+  //___________________________________________
+  void NitrogenClient::reset( unsigned long changed )
+  {
+    if( changed & SettingCompositing )
+    {
+      updateWindowShape();
+      widget()->update();
+    }
+    
+    KCommonDecorationUnstable::reset( changed );
+  }
+
   //___________________________________________
   bool NitrogenClient::isMaximized() const
   { return maximizeMode()==MaximizeFull && !options()->moveResizeMaximizedWindows();  }
diff --git a/clients/nitrogen/nitrogenclient.h b/clients/nitrogen/nitrogenclient.h
index 7ad8d0c88a..57c239705c 100644
--- a/clients/nitrogen/nitrogenclient.h
+++ b/clients/nitrogen/nitrogenclient.h
@@ -78,6 +78,9 @@ namespace Nitrogen
         //! initialization
         virtual void init();
 
+        // reset
+        virtual void reset( unsigned long changed );
+
         //! return associated configuration
         NitrogenConfiguration configuration( void ) const;