diff --git a/interface/wx/choicebk.h b/interface/wx/choicebk.h
index fff9b1e17e..239fc4dfd8 100644
--- a/interface/wx/choicebk.h
+++ b/interface/wx/choicebk.h
@@ -63,7 +63,7 @@ public:
                  const wxPoint& pos = wxDefaultPosition,
                  const wxSize& size = wxDefaultSize,
                  long style = 0,
-                 const wxString& name = wxEmptyStr);
+                 const wxString& name = wxEmptyString);
     //@}
 
     /**
diff --git a/interface/wx/toolbook.h b/interface/wx/toolbook.h
index 26281e3173..b2db21a8d6 100644
--- a/interface/wx/toolbook.h
+++ b/interface/wx/toolbook.h
@@ -58,7 +58,7 @@ public:
                  const wxPoint& pos = wxDefaultPosition,
                  const wxSize& size = wxDefaultSize,
                  long style = 0,
-                 const wxString& name = wxEmptyStr);
+                 const wxString& name = wxEmptyString);
     //@}
 
     /**