diff --git a/lib/galaxy/model/__init__.py b/lib/galaxy/model/__init__.py
index dc389805f58a..b9a39445c696 100644
--- a/lib/galaxy/model/__init__.py
+++ b/lib/galaxy/model/__init__.py
@@ -688,7 +688,7 @@ def calculate_user_disk_usage_statements(user_id, quota_source_map, for_sqlite=F
 """
 
 
-def calculate_disk_usage_per_objectstore(sa_session, user_id: str):
+def calculate_disk_usage_per_objectstore(sa_session, user_id: int):
     statement = UNIQUE_DATASET_USER_USAGE_PER_OBJECTSTORE
     params = {"id": user_id}
     return sa_session.execute(text(statement), params).all()