diff --git a/include/wx/gtk/checklst.h b/include/wx/gtk/checklst.h
index b41423927b..3cfbd76407 100644
--- a/include/wx/gtk/checklst.h
+++ b/include/wx/gtk/checklst.h
@@ -7,21 +7,8 @@
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifndef __GTKCHECKLISTH__
-#define __GTKCHECKLISTH__
-
-// ----------------------------------------------------------------------------
-// macros
-// ----------------------------------------------------------------------------
-
-// there is no "right" choice of the checkbox indicators, so allow the user to
-// define them himself if he wants
-#ifndef wxCHECKLBOX_CHECKED
-    #define wxCHECKLBOX_CHECKED   wxT('x')
-    #define wxCHECKLBOX_UNCHECKED wxT(' ')
-
-    #define wxCHECKLBOX_STRING    wxT("[ ] ")
-#endif
+#ifndef _WX_GTKCHECKLIST_H_
+#define _WX_GTKCHECKLIST_H_
 
 //-----------------------------------------------------------------------------
 // wxCheckListBox
@@ -35,7 +22,7 @@ public:
             const wxPoint& pos = wxDefaultPosition,
             const wxSize& size = wxDefaultSize,
             int nStrings = 0,
-            const wxString *choices = (const wxString *)NULL,
+            const wxString *choices = NULL,
             long style = 0,
             const wxValidator& validator = wxDefaultValidator,
             const wxString& name = wxListBoxNameStr);
@@ -47,8 +34,8 @@ public:
             const wxValidator& validator = wxDefaultValidator,
             const wxString& name = wxListBoxNameStr);
 
-    bool IsChecked(unsigned int index) const;
-    void Check(unsigned int index, bool check = true);
+    virtual bool IsChecked(unsigned int index) const;
+    virtual void Check(unsigned int index, bool check = true);
 
     int GetItemHeight() const;
 
@@ -58,4 +45,4 @@ private:
     DECLARE_DYNAMIC_CLASS(wxCheckListBox)
 };
 
-#endif   //__GTKCHECKLISTH__
+#endif   // _WX_GTKCHECKLIST_H_