diff --git a/src-ui/src/app/components/document-detail/document-detail.component.ts b/src-ui/src/app/components/document-detail/document-detail.component.ts
index 43679343f..227c86411 100644
--- a/src-ui/src/app/components/document-detail/document-detail.component.ts
+++ b/src-ui/src/app/components/document-detail/document-detail.component.ts
@@ -856,7 +856,7 @@ export class DocumentDetailComponent
   public getCustomFieldFromInstance(
     instance: PaperlessCustomFieldInstance
   ): PaperlessCustomField {
-    return this.customFields.find((f) => f.id === instance.field)
+    return this.customFields?.find((f) => f.id === instance.field)
   }
 
   private updateFormForCustomFields(emitEvent: boolean = false) {