diff --git a/src/lmstudio/sync_api.py b/src/lmstudio/sync_api.py
index ba73958..5751d4b 100644
--- a/src/lmstudio/sync_api.py
+++ b/src/lmstudio/sync_api.py
@@ -1709,7 +1709,7 @@ def list_loaded_models(
 @sdk_public_api()
 def configure_default_client(api_host: str, api_token: str | None = None) -> None:
     """Set the server API host for the default global client (without creating the client)."""
-    global _default_api_host
+    global _default_api_host, _default_api_token
     if _default_client is not None:
         raise LMStudioClientError(
             "Default client is already created, cannot set its API host or token."