diff --git a/autowrap/CodeGenerator.py b/autowrap/CodeGenerator.py
index 1afe21b..a176f72 100644
--- a/autowrap/CodeGenerator.py
+++ b/autowrap/CodeGenerator.py
@@ -1738,7 +1738,7 @@ def create_special_setitem_method(self, mdcl):
             raise Exception("setitem method currently only supports a single argument.")
 
         # TODO make sure it is a basic type (class or builtin, no list/dict)
-        _, ctype = mdcl.arguments[0]
+        _, ctype_in = mdcl.arguments[0]
         in_converter = self.cr.get(ctype_in)
         in_t_py = in_converter.matching_python_type_full(ctype_in)