diff --git a/src/StdMeshers/StdMeshers_NumberOfSegments.hxx b/src/StdMeshers/StdMeshers_NumberOfSegments.hxx
index 79147e1a2..5ae8dc918 100644
--- a/src/StdMeshers/StdMeshers_NumberOfSegments.hxx
+++ b/src/StdMeshers/StdMeshers_NumberOfSegments.hxx
@@ -45,7 +45,7 @@ public:
 
   int GetNumberOfSegments() const;
 
-  void SetScaleFactor(double scaleFactor)
+  virtual void SetScaleFactor(double scaleFactor)
     throw (SALOME_Exception);
 
   double GetScaleFactor() const;
diff --git a/src/StdMeshers/StdMeshers_Regular_1D.hxx b/src/StdMeshers/StdMeshers_Regular_1D.hxx
index 96128d984..b9d61432b 100644
--- a/src/StdMeshers/StdMeshers_Regular_1D.hxx
+++ b/src/StdMeshers/StdMeshers_Regular_1D.hxx
@@ -58,9 +58,9 @@ public:
 
 protected:
 
-  bool computeInternalParameters (const TopoDS_Edge&    theEdge,
-                                  std::list< double > & theParameters,
-                                  const bool            theReverse) const;
+  virtual bool computeInternalParameters (const TopoDS_Edge&    theEdge,
+                                          std::list< double > & theParameters,
+                                          const bool            theReverse) const;
 
   enum HypothesisType { LOCAL_LENGTH, NB_SEGMENTS, BEG_END_LENGTH, DEFLECTION, ARITHMETIC_1D, NONE };