diff --git a/src/SMESHGUI/SMESHGUI_Hypotheses.cxx b/src/SMESHGUI/SMESHGUI_Hypotheses.cxx
index a790cf126..7d2d2561c 100644
--- a/src/SMESHGUI/SMESHGUI_Hypotheses.cxx
+++ b/src/SMESHGUI/SMESHGUI_Hypotheses.cxx
@@ -469,7 +469,7 @@ void SMESHGUI_HypothesisDlg::setCustomFrame( QFrame* f )
   if( f )
   {
     f->setParent( mainFrame() );
-    qobject_cast<QVBoxLayout*>( layout() )->insertWidget( 1, f, 1 );
+    qobject_cast<QVBoxLayout*>( mainFrame()->layout() )->insertWidget( 1, f, 1 );
   }
 }