diff --git a/app/controllers/room_management/overview.php b/app/controllers/room_management/overview.php
index e0d54799c0e47862015e560d020edb9e86a22c0f..f41cd1945a7d39ecbf9f3cb660f35e684301a71d 100644
--- a/app/controllers/room_management/overview.php
+++ b/app/controllers/room_management/overview.php
@@ -320,6 +320,9 @@ class RoomManagement_OverviewController extends AuthenticatedController
                     'resources/room_group/permissions',
                     ['room_ids' => $room_ids]
                 );
+            } else {
+                PageLayout::postInfo(_('Das Gebäude hat keine Räume.'));
+                $this->buildings = [];
             }
         }
     }