diff --git a/gtwrap/xml_parser/xml_parser.py b/gtwrap/xml_parser/xml_parser.py
index 9b3d4d804..9920027ac 100644
--- a/gtwrap/xml_parser/xml_parser.py
+++ b/gtwrap/xml_parser/xml_parser.py
@@ -54,7 +54,7 @@ class XMLDocParser:
 
         # Find which member to get docs from, if there are multiple that match in name and args
         documenting_index = self.determine_documenting_index(
-            cpp_class, cpp_method, method_args_names)
+            cpp_class, cpp_method, method_args_names, member_defs)
 
         # Extract the docs for the function that matches cpp_class.cpp_method(*method_args_names).
         return self.get_formatted_docstring(member_defs[documenting_index],