diff --git a/src/mock_vws/_requests_mock_server/mock_web_query_api.py b/src/mock_vws/_requests_mock_server/mock_web_query_api.py
index f22cd9c69..26c2442c4 100644
--- a/src/mock_vws/_requests_mock_server/mock_web_query_api.py
+++ b/src/mock_vws/_requests_mock_server/mock_web_query_api.py
@@ -7,6 +7,7 @@
 import email.utils
 from collections.abc import Callable, Iterable, Mapping
 from http import HTTPMethod, HTTPStatus
+from types import MethodType
 
 from beartype import beartype
 from requests.models import PreparedRequest
@@ -52,8 +53,9 @@ def decorator(
             The given `method` with multiple changes, including added
             validators.
         """
+        route_name = method.__name__ if isinstance(method, MethodType) else ""
         new_route = Route(
-            route_name=method.__name__,
+            route_name=route_name,
             path_pattern=path_pattern,
             http_methods=frozenset(http_methods),
         )
diff --git a/src/mock_vws/_requests_mock_server/mock_web_services_api.py b/src/mock_vws/_requests_mock_server/mock_web_services_api.py
index 9a6b30a8d..96e996f70 100644
--- a/src/mock_vws/_requests_mock_server/mock_web_services_api.py
+++ b/src/mock_vws/_requests_mock_server/mock_web_services_api.py
@@ -12,6 +12,7 @@
 import uuid
 from collections.abc import Callable, Iterable, Mapping
 from http import HTTPMethod, HTTPStatus
+from types import MethodType
 from typing import Any
 from zoneinfo import ZoneInfo
 
@@ -67,8 +68,9 @@ def decorator(
             The given `method` with multiple changes, including added
             validators.
         """
+        route_name = method.__name__ if isinstance(method, MethodType) else ""
         new_route = Route(
-            route_name=method.__name__,
+            route_name=route_name,
             path_pattern=path_pattern,
             http_methods=frozenset(http_methods),
         )