diff --git a/src/app/components/shared/room-list/room-list.component.html b/src/app/components/shared/room-list/room-list.component.html
index fdda6e013df733df45ef2e3b38c07b69d2f5fbde..6b7c0dffe8f87dbec1bffcdefd7148092f96f790 100644
--- a/src/app/components/shared/room-list/room-list.component.html
+++ b/src/app/components/shared/room-list/room-list.component.html
@@ -20,7 +20,7 @@
     {{ room.description }}
   </p>
 </mat-expansion-panel>
-<mat-card *ngIf="rooms.length === 0">
+<mat-card *ngIf="rooms && rooms.length === 0">
   <mat-card-header>
     <mat-card-title *ngIf="baseUrl === 'creator'">Sie haben noch keine Sessions erstellt!</mat-card-title>
     <mat-card-title *ngIf="baseUrl === 'participant'">Sie sind noch keiner Session beigetreten!</mat-card-title>