diff --git a/lib/galaxy/webapps/galaxy/controllers/admin.py b/lib/galaxy/webapps/galaxy/controllers/admin.py
index 7e788bb1cc0f..bd0ea3a06158 100644
--- a/lib/galaxy/webapps/galaxy/controllers/admin.py
+++ b/lib/galaxy/webapps/galaxy/controllers/admin.py
@@ -73,7 +73,7 @@ def sort(self, trans, query, ascending, column_name=None):
                 .group_by(model.GalaxySession.table.c.user_id)
                 .subquery()
             )
-            query = query.outerjoin((last_login_subquery, model.User.table.c.id == last_login_subquery.c.user_id))
+            query = query.outerjoin(last_login_subquery, model.User.table.c.id == last_login_subquery.c.user_id)
 
             if not ascending:
                 query = query.order_by((last_login_subquery.c.last_login).desc().nullslast())