diff --git a/src/SMDS/SMDS_UnstructuredGrid.cxx b/src/SMDS/SMDS_UnstructuredGrid.cxx
index 6d16a9dd0..16eb2537e 100644
--- a/src/SMDS/SMDS_UnstructuredGrid.cxx
+++ b/src/SMDS/SMDS_UnstructuredGrid.cxx
@@ -285,8 +285,6 @@ void SMDS_UnstructuredGrid::compactGrid(std::vector<int>& idNodesOldToNew, int n
         }
       newFaceLocations->Squeeze();
       newFaces->Squeeze();
-      newFaceLocations->Register(this);
-      newFaces->Register(this);
       this->SetCells(newTypes, newLocations, newConnectivity, newFaceLocations, newFaces);
       newFaceLocations->Delete();
       newFaces->Delete();