diff --git a/rakelib/lib/director/persistent_window.rb b/rakelib/lib/director/persistent_window.rb
index ccaa3b13..c5d9f595 100644
--- a/rakelib/lib/director/persistent_window.rb
+++ b/rakelib/lib/director/persistent_window.rb
@@ -14,8 +14,8 @@ class PersistentWindow < Director
 
       def setup
         spec.items << 'wxPersistentTLW' << 'wxPersistentBookCtrl' << 'wxPersistentTreeBookCtrl'
-        if Config.instance.wx_version >= '3.0.0'
-          # before 3.0.0 this was not properly available
+        if Config.instance.wx_version >= '3.3.0'
+          # before 3.3.0 this was not properly available
           spec.items << 'wxPersistentComboBox'
         end
         super