diff --git a/src/SMDS/SMDS_BallElement.cxx b/src/SMDS/SMDS_BallElement.cxx
index 1b912adc8..5315eeb3f 100644
--- a/src/SMDS/SMDS_BallElement.cxx
+++ b/src/SMDS/SMDS_BallElement.cxx
@@ -30,7 +30,7 @@
 void SMDS_BallElement::init(const SMDS_MeshNode * node, double diameter )
 {
   vtkIdType nodeVtkID = node->GetVtkID();
-  int vtkID = getGrid()->InsertNextLinkedCell( toVtkType( SMDSEntity_Ball ), 1, &nodeVtkID );
+  vtkIdType vtkID = getGrid()->InsertNextLinkedCell( toVtkType( SMDSEntity_Ball ), 1, &nodeVtkID );
   setVtkID( vtkID );
   getGrid()->SetBallDiameter( GetVtkID(), diameter );
 }
diff --git a/src/SMDS/SMDS_ElementHolder.cxx b/src/SMDS/SMDS_ElementHolder.cxx
index 1f06ff5aa..d5e40d6a6 100644
--- a/src/SMDS/SMDS_ElementHolder.cxx
+++ b/src/SMDS/SMDS_ElementHolder.cxx
@@ -73,7 +73,7 @@ void SMDS_ElementHolder::beforeCompacting()
     else
     {
       myExternalElems.push_back( e );
-      myVtkIDs.push_back( -1 * (int)myExternalElems.size() );
+      myVtkIDs.push_back( -1 * (vtkIdType)myExternalElems.size() );
     }
   }
 }
diff --git a/src/SMDS/SMDS_MeshCell.cxx b/src/SMDS/SMDS_MeshCell.cxx
index 2cec46a8c..4096b1f38 100644
--- a/src/SMDS/SMDS_MeshCell.cxx
+++ b/src/SMDS/SMDS_MeshCell.cxx
@@ -461,8 +461,8 @@ void SMDS_MeshCell::init( SMDSAbs_EntityType theEntity, int theNbNodes, ... )
   }
   va_end( vl );
 
-  int vtkType = toVtkType( theEntity );
-  int   vtkID = getGrid()->InsertNextLinkedCell( vtkType, theNbNodes, vtkIds );
+  int     vtkType = toVtkType( theEntity );
+  vtkIdType vtkID = getGrid()->InsertNextLinkedCell( vtkType, theNbNodes, vtkIds );
   setVtkID( vtkID );
 }
 
@@ -473,8 +473,8 @@ void SMDS_MeshCell::init( SMDSAbs_EntityType                       theEntity,
   for ( size_t i = 0; i < nodes.size(); ++i )
     vtkIds[i] = nodes[i]->GetVtkID();
 
-  int vtkType = toVtkType( theEntity );
-  int   vtkID = getGrid()->InsertNextLinkedCell( vtkType, nodes.size(), &vtkIds[0] );
+  int     vtkType = toVtkType( theEntity );
+  vtkIdType vtkID = getGrid()->InsertNextLinkedCell( vtkType, nodes.size(), &vtkIds[0] );
   setVtkID( vtkID );
 }
 
@@ -482,8 +482,8 @@ void SMDS_MeshCell::init( SMDSAbs_EntityType            theEntity,
                           const std::vector<vtkIdType>& vtkNodeIds )
 {
   int vtkType = toVtkType( theEntity );
-  int   vtkID = getGrid()->InsertNextLinkedCell( vtkType, vtkNodeIds.size(),
-                                                 const_cast< vtkIdType* > ( &vtkNodeIds[0] ));
+  vtkIdType vtkID = getGrid()->InsertNextLinkedCell( vtkType, vtkNodeIds.size(),
+                                                     const_cast< vtkIdType* > ( &vtkNodeIds[0] ));
   setVtkID( vtkID );
 }
 
diff --git a/src/SMDS/SMDS_MeshVolume.cxx b/src/SMDS/SMDS_MeshVolume.cxx
index 67b3c773d..e24f18b66 100644
--- a/src/SMDS/SMDS_MeshVolume.cxx
+++ b/src/SMDS/SMDS_MeshVolume.cxx
@@ -50,7 +50,7 @@ void SMDS_MeshVolume::init( const std::vector<const SMDS_MeshNode*>& nodes,
       ptIds.push_back( nodes[ iN++ ]->GetVtkID() );
   }
 
-  int vtkID = getGrid()->InsertNextLinkedCell(VTK_POLYHEDRON, nbFaces, &ptIds[0]);
+  vtkIdType vtkID = getGrid()->InsertNextLinkedCell(VTK_POLYHEDRON, nbFaces, &ptIds[0]);
   setVtkID( vtkID );
 }
 
diff --git a/src/SMDS/SMDS_VtkCellIterator.cxx b/src/SMDS/SMDS_VtkCellIterator.cxx
index 87e4830c3..15fc994ac 100644
--- a/src/SMDS/SMDS_VtkCellIterator.cxx
+++ b/src/SMDS/SMDS_VtkCellIterator.cxx
@@ -25,7 +25,7 @@
 
 _GetVtkNodes::_GetVtkNodes( TVtkIdList&        vtkIds,
                             SMDS_Mesh*         mesh,
-                            int                vtkCellId,
+                            vtkIdType          vtkCellId,
                             SMDSAbs_EntityType type )
 {
   vtkUnstructuredGrid*         grid = mesh->GetGrid();
@@ -47,7 +47,7 @@ _GetVtkNodes::_GetVtkNodes( TVtkIdList&        vtkIds,
 
 _GetVtkNodesToUNV::_GetVtkNodesToUNV( TVtkIdList&        vtkIds,
                                       SMDS_Mesh*         mesh,
-                                      int                vtkCellId,
+                                      vtkIdType          vtkCellId,
                                       SMDSAbs_EntityType type )
 {
   vtkUnstructuredGrid* grid = mesh->GetGrid();
@@ -133,7 +133,7 @@ _GetVtkNodesToUNV::_GetVtkNodesToUNV( TVtkIdList&        vtkIds,
 
 _GetVtkNodesPolyh::_GetVtkNodesPolyh( TVtkIdList&        vtkIds,
                                       SMDS_Mesh*         mesh,
-                                      int                vtkCellId,
+                                      vtkIdType          vtkCellId,
                                       SMDSAbs_EntityType type )
 {
   vtkUnstructuredGrid* grid = mesh->GetGrid();
diff --git a/src/SMDS/SMDS_VtkCellIterator.hxx b/src/SMDS/SMDS_VtkCellIterator.hxx
index 683f678a2..808411483 100644
--- a/src/SMDS/SMDS_VtkCellIterator.hxx
+++ b/src/SMDS/SMDS_VtkCellIterator.hxx
@@ -34,15 +34,15 @@ typedef std::vector< vtkIdType > TVtkIdList;
  */
 struct _GetVtkNodes
 {
-  _GetVtkNodes( TVtkIdList& nodeIds, SMDS_Mesh* mesh, int vtkCellId, SMDSAbs_EntityType type);
+  _GetVtkNodes( TVtkIdList& nodeIds, SMDS_Mesh* mesh, vtkIdType vtkCellId, SMDSAbs_EntityType type);
 };
 struct _GetVtkNodesToUNV
 {
-  _GetVtkNodesToUNV( TVtkIdList& nodeIds, SMDS_Mesh* mesh, int vtkCellId, SMDSAbs_EntityType type);
+  _GetVtkNodesToUNV( TVtkIdList& nodeIds, SMDS_Mesh* mesh, vtkIdType vtkCellId, SMDSAbs_EntityType type);
 };
 struct _GetVtkNodesPolyh
 {
-  _GetVtkNodesPolyh( TVtkIdList& nodeIds, SMDS_Mesh* mesh, int vtkCellId, SMDSAbs_EntityType type);
+  _GetVtkNodesPolyh( TVtkIdList& nodeIds, SMDS_Mesh* mesh, vtkIdType vtkCellId, SMDSAbs_EntityType type);
 };
 
 //--------------------------------------------------------------------------------
@@ -55,7 +55,7 @@ class SMDS_VtkCellIterator: public SMDS_ITERATOR
 public:
   typedef typename SMDS_ITERATOR::value_type result_type;
 
-  SMDS_VtkCellIterator(SMDS_Mesh* mesh, int vtkCellId, SMDSAbs_EntityType aType)
+  SMDS_VtkCellIterator(SMDS_Mesh* mesh, vtkIdType vtkCellId, SMDSAbs_EntityType aType)
     : _mesh(mesh), _index(0)
   {
     GET_VTK_NODES getNodes( _vtkIdList, mesh, vtkCellId, aType );
@@ -78,7 +78,7 @@ class SMDS_VtkCellIteratorToUNV: public SMDS_VtkCellIterator< SMDS_ITERATOR, _Ge
 {
   typedef SMDS_VtkCellIterator< SMDS_ITERATOR, _GetVtkNodesToUNV > parent_t;
 public:
-  SMDS_VtkCellIteratorToUNV(SMDS_Mesh* mesh, int vtkCellId, SMDSAbs_EntityType type):
+  SMDS_VtkCellIteratorToUNV(SMDS_Mesh* mesh, vtkIdType vtkCellId, SMDSAbs_EntityType type):
     parent_t( mesh, vtkCellId, type ) {}
 };
 
@@ -88,7 +88,7 @@ class SMDS_VtkCellIteratorPolyH: public SMDS_VtkCellIterator< SMDS_ITERATOR, _Ge
 {
   typedef SMDS_VtkCellIterator< SMDS_ITERATOR, _GetVtkNodesPolyh > parent_t;
 public:
-  SMDS_VtkCellIteratorPolyH(SMDS_Mesh* mesh, int vtkCellId, SMDSAbs_EntityType type):
+  SMDS_VtkCellIteratorPolyH(SMDS_Mesh* mesh, vtkIdType vtkCellId, SMDSAbs_EntityType type):
     parent_t( mesh, vtkCellId, type ) {}
 };