diff --git a/group.cpp b/group.cpp
index 6a3a4b621e..91b73d80ba 100644
--- a/group.cpp
+++ b/group.cpp
@@ -419,6 +419,8 @@ void Client::setTransient( Window new_transient_for_id )
             transient_for->addTransient( this );
             } // checkGroup() will check 'check_active_modal'
         checkGroup( NULL, true ); // force, because transiency has changed
+        if( isTopMenu())
+            workspace()->updateCurrentTopMenu();
         workspace()->updateClientLayer( this );
         }
     }
diff --git a/workspace.h b/workspace.h
index a5f2a22006..2c0209ddee 100644
--- a/workspace.h
+++ b/workspace.h
@@ -245,6 +245,7 @@ class Workspace : public QObject, public KWinInterface, public KDecorationDefine
 
         bool managingTopMenus() const;
         int topMenuHeight() const;
+        void updateCurrentTopMenu();
 
         int packPositionLeft( const Client* cl, int oldx, bool left_edge ) const;
         int packPositionRight( const Client* cl, int oldx, bool right_edge ) const;
@@ -369,7 +370,6 @@ class Workspace : public QObject, public KWinInterface, public KDecorationDefine
         bool allowFullClientRaising( const Client* c, Time timestamp );
         bool keepTransientAbove( const Client* mainwindow, const Client* transient );
         void blockStackingUpdates( bool block );
-        void updateCurrentTopMenu();
         void addTopMenu( Client* c );
         void removeTopMenu( Client* c );
         void setupTopMenuHandling();