diff --git a/wx/lib/agw/customtreectrl.py b/wx/lib/agw/customtreectrl.py
index d10a0182..bfaa0419 100644
--- a/wx/lib/agw/customtreectrl.py
+++ b/wx/lib/agw/customtreectrl.py
@@ -8753,7 +8753,7 @@ if __name__ == '__main__':
     # our normal wxApp-derived class, as usual
 
     app = wx.App(0)
-
+    locale = wx.Locale(wx.LANGUAGE_DEFAULT)
     frame = MyFrame(None)
     app.SetTopWindow(frame)
     frame.Show()
diff --git a/wx/lib/agw/hypertreelist.py b/wx/lib/agw/hypertreelist.py
index 6adaf4ad..7e89d21f 100644
--- a/wx/lib/agw/hypertreelist.py
+++ b/wx/lib/agw/hypertreelist.py
@@ -4955,7 +4955,7 @@ if __name__ == '__main__':
     # our normal wxApp-derived class, as usual
 
     app = wx.App(0)
-
+    locale = wx.Locale(wx.LANGUAGE_DEFAULT)
     frame = MyFrame(None)
     app.SetTopWindow(frame)
     frame.Show()