diff --git a/src/SMESH/SMESH_MesherHelper.cxx b/src/SMESH/SMESH_MesherHelper.cxx
index 314a0f5c7..65a19e286 100644
--- a/src/SMESH/SMESH_MesherHelper.cxx
+++ b/src/SMESH/SMESH_MesherHelper.cxx
@@ -845,7 +845,7 @@ gp_XY SMESH_MesherHelper::GetCenterUV(const gp_XY& uv1,
 double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge&   E,
                                     const SMDS_MeshNode* n,
                                     const SMDS_MeshNode* inEdgeNode,
-                                    bool*                check)
+                                    bool*                check) const
 {
   double param = Precision::Infinite();
 
diff --git a/src/SMESH/SMESH_MesherHelper.hxx b/src/SMESH/SMESH_MesherHelper.hxx
index e6f5bb239..f2b4d9ffc 100644
--- a/src/SMESH/SMESH_MesherHelper.hxx
+++ b/src/SMESH/SMESH_MesherHelper.hxx
@@ -420,7 +420,7 @@ public:
   double GetNodeU(const TopoDS_Edge&   theEdge,
                   const SMDS_MeshNode* theNode,
                   const SMDS_MeshNode* inEdgeNode=0,
-                  bool*                check=0);
+                  bool*                check=0) const;
   /*!
    * \brief Return node UV on face
    *  \param inFaceNode - a node of element being created located inside a face