diff --git a/src/SMESHGUI/SMESHGUI_Dialog.cxx b/src/SMESHGUI/SMESHGUI_Dialog.cxx
index 4b4c109b5..259d936aa 100644
--- a/src/SMESHGUI/SMESHGUI_Dialog.cxx
+++ b/src/SMESHGUI/SMESHGUI_Dialog.cxx
@@ -75,9 +75,14 @@ void SMESHGUI_Dialog::show()
 // function : setContentActive
 // purpose  :
 //=================================================================================
-void SMESHGUI_Dialog::setContentActive( const bool active ) const
+void SMESHGUI_Dialog::setContentActive( const bool active )
 {
   mainFrame()->setEnabled( active );
+  setButtonEnabled( active, OK );
+  setButtonEnabled( active, Apply );
+  setButtonEnabled( active, Cancel );
+  setButtonEnabled( active, Close );
+  setButtonEnabled( active, Help );
 }
 
 //=================================================================================
diff --git a/src/SMESHGUI/SMESHGUI_Dialog.h b/src/SMESHGUI/SMESHGUI_Dialog.h
index 20bc86e78..f3e93409c 100644
--- a/src/SMESHGUI/SMESHGUI_Dialog.h
+++ b/src/SMESHGUI/SMESHGUI_Dialog.h
@@ -51,7 +51,7 @@ public:
   virtual void      show();
 
   //! set all content to enable (parameter is true) or disable state
-  virtual void      setContentActive( const bool ) const;
+  virtual void      setContentActive( const bool );
 
   //! Return hard-coded prefix using to differ overlapping types
   static int        prefix( const QString& );