diff --git a/mmengine/config/utils.py b/mmengine/config/utils.py
index 81b58fb49a..bb15d689bd 100644
--- a/mmengine/config/utils.py
+++ b/mmengine/config/utils.py
@@ -175,6 +175,8 @@ def _is_builtin_module(module_name: str) -> bool:
     origin_path = getattr(spec, 'origin', None)
     if origin_path is None:
         return False
+    if origin_path == 'frozen':
+        return True
     origin_path = osp.abspath(origin_path)
     if ('site-package' in origin_path or 'dist-package' in origin_path
             or not origin_path.startswith(