diff --git a/cps/shelf.py b/cps/shelf.py
index b13fe556..30768930 100644
--- a/cps/shelf.py
+++ b/cps/shelf.py
@@ -308,6 +308,7 @@ def delete_shelf(shelf_id):
 
 @shelf.route("/shelf/<int:shelf_id>", defaults={'shelf_type': 1})
 @shelf.route("/shelf/<int:shelf_id>/<int:shelf_type>")
+@login_required
 def show_shelf(shelf_type, shelf_id):
     shelf = ub.session.query(ub.Shelf).filter(ub.Shelf.id == shelf_id).first()