diff --git a/apps/red-ui/src/app/modules/dossier/screens/dossier-overview-screen/dossier-overview-screen.component.ts b/apps/red-ui/src/app/modules/dossier/screens/dossier-overview-screen/dossier-overview-screen.component.ts
index 7ca99eca1..2f161efcd 100644
--- a/apps/red-ui/src/app/modules/dossier/screens/dossier-overview-screen/dossier-overview-screen.component.ts
+++ b/apps/red-ui/src/app/modules/dossier/screens/dossier-overview-screen/dossier-overview-screen.component.ts
@@ -448,7 +448,8 @@ export class DossierOverviewScreenComponent
             {
                 key: this.user.id,
                 label: 'dossier-overview.quick-filters.assigned-to-others',
-                checker: (file: FileStatusWrapper) => file.currentReviewer !== this.user.id
+                checker: (file: FileStatusWrapper) =>
+                    !!file.currentReviewer && file.currentReviewer !== this.user.id
             }
         ];
     }