diff --git a/etgtools/tweaker_tools.py b/etgtools/tweaker_tools.py
index 9596eadc..1b99145a 100644
--- a/etgtools/tweaker_tools.py
+++ b/etgtools/tweaker_tools.py
@@ -239,7 +239,7 @@ def fixWindowClass(klass, hideVirtuals=True, ignoreProtected=True):
                 parent.transferThis = True
             # if there is an id param give it a default
             id = func.findItem('id') or func.findItem('winid')
-            if id:
+            if id and not id.default:
                 id.default = 'wxID_ANY'
 
             # if there is a pos or size parameter without a default then give it one.
diff --git a/unittests/test_cshelp.py b/unittests/test_cshelp.py
index 6eb6910a..bb4e4600 100644
--- a/unittests/test_cshelp.py
+++ b/unittests/test_cshelp.py
@@ -13,7 +13,10 @@ class cshelp_Tests(wtc.WidgetTestCase):
         pnl = wx.Panel(self.frame)
         pnl.SetHelpText("HelpMe!")
         cBtn = wx.ContextHelpButton(pnl)
-        
+
+        # Make sure we haven't borked the magic ID
+        assert cBtn.GetId() == wx.ID_CONTEXT_HELP
+
         
     def test_cshelp2(self):
         wx.wxEVT_HELP