diff --git a/src/otf_api/api.py b/src/otf_api/api.py
index 7385a71..7fe785b 100644
--- a/src/otf_api/api.py
+++ b/src/otf_api/api.py
@@ -645,7 +645,7 @@ def add_favorite_studio(self, studio_uuids: list[str] | str) -> list[models.Stud
             studios. If a string is provided, it will be converted to a list.
 
         Returns:
-            None
+            list[StudioDetail]: The new favorite studios.
         """
         if isinstance(studio_uuids, str):
             studio_uuids = [studio_uuids]