diff --git a/roomunlock.html b/roomunlock.html
index 8bfbb374dcc1f72a01103edfe89c5050ca89a681..3a35cd7891e1fd2dab31ff315186532005871df5 100644
--- a/roomunlock.html
+++ b/roomunlock.html
@@ -82,7 +82,7 @@
     const roomUrl = document.getElementById('roomUrl');
 
     let room = window.location.href.substring(window.location.href.lastIndexOf('/') + 1)
-    if (room !== "raumfreischaltung") {
+    if (room.length > 2 && room !== "raumfreischaltung") {
         roomField.value = room;
         get_room();
     }