diff --git a/etg/mimetype.py b/etg/mimetype.py
index cc15b2e0..cb84a8f8 100644
--- a/etg/mimetype.py
+++ b/etg/mimetype.py
@@ -146,11 +146,18 @@ def run():
     #-----------------------------------------------------------------
     c = module.find('wxFileTypeInfo')
     
-    # Ignore the last two args for this ctor as the varargs is causing some
-    # trouble. TODO: Figure this out...
+    # Ignore the variadic nature of this ctor
     ctor = c.find('wxFileTypeInfo').findOverload('extension')
     ctor.items[-1].ignore()
-    ctor.items[-2].ignore()
+    ctor.setCppCode("""\
+        wxFileTypeInfo* fti = new wxFileTypeInfo(*mimeType);
+        fti->SetOpenCommand(*openCmd);
+        fti->SetPrintCommand(*printCmd);
+        fti->SetDescription(*description);
+        fti->AddExtension(*extension);
+        return fti;
+        """)
+    ctor.useDerivedName = False
     
     
     #-----------------------------------------------------------------
diff --git a/etgtools/extractors.py b/etgtools/extractors.py
index 059d97a9..229c2033 100644
--- a/etgtools/extractors.py
+++ b/etgtools/extractors.py
@@ -1104,6 +1104,7 @@ class CppMethodDef(MethodDef):
         super(CppMethodDef, self).__init__()
         self.type = type
         self.name = name
+        self.useDerivedName = True
         self.argsString = argsString
         self.body = body
         self.briefDoc = doc
diff --git a/unittests/test_mimetype.py b/unittests/test_mimetype.py
index 35b1f616..527704d4 100644
--- a/unittests/test_mimetype.py
+++ b/unittests/test_mimetype.py
@@ -19,8 +19,7 @@ class mimetype_Tests(wtc.WidgetTestCase):
         ft.GetIcon()
 
     def test_mimetype3(self):        
-        fti = wx.FileTypeInfo('mime', 'open', 'print', 'desc')
-        fti.AddExtension('ext1')
+        fti = wx.FileTypeInfo('mime', 'open', 'print', 'desc', 'ext1')
         fti.AddExtension('ext2')
         fti.AddExtension('ext3')                       
         self.assertEqual(fti.GetMimeType(), 'mime')