diff --git a/etgtools/tweaker_tools.py b/etgtools/tweaker_tools.py
index f0f9a36d..db2898c8 100644
--- a/etgtools/tweaker_tools.py
+++ b/etgtools/tweaker_tools.py
@@ -49,6 +49,7 @@ def removeWxPrefixes(node):
            and item.name.startswith('wx') \
            and not item.name.startswith('wxEVT_') \
            and not isinstance(item, (extractors.TypedefDef,
+                                     extractors.ParamDef,
                                      extractors.MethodDef )):  # TODO: Any others?
                 item.pyName = item.name[2:]
                 item.wxDropped = True