diff --git a/src/SMESH/SMESH_MeshEditor.cxx b/src/SMESH/SMESH_MeshEditor.cxx
index 01e5f628a..0673fc64e 100644
--- a/src/SMESH/SMESH_MeshEditor.cxx
+++ b/src/SMESH/SMESH_MeshEditor.cxx
@@ -7478,6 +7478,8 @@ void SMESH_MeshEditor::FindEqualElements( TIDSortedElemSet &        theElements,
   while ( elemIt->more() )
   {
     const SMDS_MeshElement* curElem = elemIt->next();
+    if ( curElem->IsNull() )
+      continue;
     ComparableElement      compElem = curElem;
     // check uniqueness
     const ComparableElement& elemInSet = mapOfElements.Added( compElem );