diff --git a/src/Select3D/Select3D_SensitiveCircle.hxx b/src/Select3D/Select3D_SensitiveCircle.hxx
index 12ca661577..0d3445463b 100644
--- a/src/Select3D/Select3D_SensitiveCircle.hxx
+++ b/src/Select3D/Select3D_SensitiveCircle.hxx
@@ -93,7 +93,7 @@ protected:
 
   //! Calculates distance from the 3d projection of used-picked screen point
   //! to center of the geometry
-  virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
 
 private:
 
diff --git a/src/Select3D/Select3D_SensitiveGroup.hxx b/src/Select3D/Select3D_SensitiveGroup.hxx
index 58e64a383c..27540f4cb4 100644
--- a/src/Select3D/Select3D_SensitiveGroup.hxx
+++ b/src/Select3D/Select3D_SensitiveGroup.hxx
@@ -143,21 +143,21 @@ public:
   //! Returns the length of vector of sensitive entities
   Standard_EXPORT virtual Standard_Integer Size() const Standard_OVERRIDE;
 
-private:
+protected:
 
   //! Checks whether the entity with index theIdx overlaps the current selecting volume
-  virtual Standard_Boolean overlapsElement (SelectBasics_PickResult& thePickResult,
-                                            SelectBasics_SelectingVolumeManager& theMgr,
-                                            Standard_Integer theElemIdx,
-                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Boolean overlapsElement (SelectBasics_PickResult& thePickResult,
+                                                            SelectBasics_SelectingVolumeManager& theMgr,
+                                                            Standard_Integer theElemIdx,
+                                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
   //! Checks whether the entity with index theIdx is inside the current selecting volume
-  virtual Standard_Boolean elementIsInside (SelectBasics_SelectingVolumeManager& theMgr,
-                                            Standard_Integer theElemIdx,
-                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Boolean elementIsInside (SelectBasics_SelectingVolumeManager& theMgr,
+                                                            Standard_Integer theElemIdx,
+                                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
   //! Calculates distance from the 3d projection of used-picked screen point to center of the geometry
-  virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
 
 private:
 
diff --git a/src/Select3D/Select3D_SensitivePoly.hxx b/src/Select3D/Select3D_SensitivePoly.hxx
index 8f600c8405..bb0b7c2deb 100644
--- a/src/Select3D/Select3D_SensitivePoly.hxx
+++ b/src/Select3D/Select3D_SensitivePoly.hxx
@@ -92,22 +92,22 @@ public:
   Standard_EXPORT virtual void Swap (const Standard_Integer theIdx1,
                                      const Standard_Integer theIdx2) Standard_OVERRIDE;
 
-private:
+protected:
 
   //! Checks whether the segment with index theIdx overlaps the current selecting volume
-  virtual Standard_Boolean overlapsElement (SelectBasics_PickResult& thePickResult,
-                                            SelectBasics_SelectingVolumeManager& theMgr,
-                                            Standard_Integer theElemIdx,
-                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Boolean overlapsElement (SelectBasics_PickResult& thePickResult,
+                                                            SelectBasics_SelectingVolumeManager& theMgr,
+                                                            Standard_Integer theElemIdx,
+                                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
   //! Checks whether the entity with index theIdx is inside the current selecting volume
-  virtual Standard_Boolean elementIsInside (SelectBasics_SelectingVolumeManager& theMgr,
-                                            Standard_Integer theElemIdx,
-                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Boolean elementIsInside (SelectBasics_SelectingVolumeManager& theMgr,
+                                                            Standard_Integer theElemIdx,
+                                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
   //! Calculates distance from the 3d projection of used-picked screen point
   //! to center of the geometry
-  virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
 
 protected:
 
diff --git a/src/Select3D/Select3D_SensitiveTriangulation.hxx b/src/Select3D/Select3D_SensitiveTriangulation.hxx
index b7228f0e21..2317c240be 100644
--- a/src/Select3D/Select3D_SensitiveTriangulation.hxx
+++ b/src/Select3D/Select3D_SensitiveTriangulation.hxx
@@ -102,18 +102,18 @@ protected:
 private:
 
   //! Checks whether the element with index theIdx overlaps the current selecting volume
-  virtual Standard_Boolean overlapsElement (SelectBasics_PickResult& thePickResult,
-                                            SelectBasics_SelectingVolumeManager& theMgr,
-                                            Standard_Integer theElemIdx,
-                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Boolean overlapsElement (SelectBasics_PickResult& thePickResult,
+                                                            SelectBasics_SelectingVolumeManager& theMgr,
+                                                            Standard_Integer theElemIdx,
+                                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
   //! Calculates distance from the 3d projection of used-picked screen point to center of the geometry
-  virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Real distanceToCOG (SelectBasics_SelectingVolumeManager& theMgr) Standard_OVERRIDE;
 
   //! Checks whether the entity with index theIdx is inside the current selecting volume
-  virtual Standard_Boolean elementIsInside (SelectBasics_SelectingVolumeManager& theMgr,
-                                            Standard_Integer theElemIdx,
-                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
+  Standard_EXPORT virtual Standard_Boolean elementIsInside (SelectBasics_SelectingVolumeManager& theMgr,
+                                                            Standard_Integer theElemIdx,
+                                                            Standard_Boolean theIsFullInside) Standard_OVERRIDE;
 
 private: