diff --git a/src/EntityGUI/EntityGUI_SubShapeDlg.cxx b/src/EntityGUI/EntityGUI_SubShapeDlg.cxx
index 9fbc5775b..5046c925d 100644
--- a/src/EntityGUI/EntityGUI_SubShapeDlg.cxx
+++ b/src/EntityGUI/EntityGUI_SubShapeDlg.cxx
@@ -638,6 +638,8 @@ void EntityGUI_SubShapeDlg::activateSelection()
   if (!myObject->_is_nil() && !isAllSubShapes())
   {
     GEOM_Displayer* aDisplayer = getDisplayer();
+    aDisplayer->Erase(myObject, false, false);
+
     int prevDisplayMode = aDisplayer->SetDisplayMode(0);
 
     SUIT_ViewWindow* aViewWindow = 0;
diff --git a/src/GroupGUI/GroupGUI_GroupDlg.cxx b/src/GroupGUI/GroupGUI_GroupDlg.cxx
index 9c3009059..cae505b78 100644
--- a/src/GroupGUI/GroupGUI_GroupDlg.cxx
+++ b/src/GroupGUI/GroupGUI_GroupDlg.cxx
@@ -784,6 +784,8 @@ void GroupGUI_GroupDlg::activateSelection()
       myIsShapeType) // check if shape type is already choosen by user
   {
     GEOM_Displayer* aDisplayer = getDisplayer();
+    aDisplayer->Erase(myMainObj, false, false);
+
     int prevDisplayMode = aDisplayer->SetDisplayMode(0);
 
     SUIT_ViewWindow* aViewWindow = 0;