diff --git a/etg/wizard.py b/etg/wizard.py
index 0172b27e..30124936 100644
--- a/etg/wizard.py
+++ b/etg/wizard.py
@@ -54,6 +54,7 @@ def run():
     c = module.find('wxWizardEvent')
     tools.fixEventClass(c)
     c.addPyCode("""\
+        EVT_WIZARD_BEFORE_PAGE_CHANGED  = wx.PyEventBinder( wxEVT_WIZARD_BEFORE_PAGE_CHANGED, 1)
         EVT_WIZARD_PAGE_CHANGED  = wx.PyEventBinder( wxEVT_WIZARD_PAGE_CHANGED, 1)
         EVT_WIZARD_PAGE_CHANGING = wx.PyEventBinder( wxEVT_WIZARD_PAGE_CHANGING, 1)
         EVT_WIZARD_CANCEL        = wx.PyEventBinder( wxEVT_WIZARD_CANCEL, 1)