diff --git a/app/lib/controller/collections_controller.dart b/app/lib/controller/collections_controller.dart
index 95f9647b..975c064a 100644
--- a/app/lib/controller/collections_controller.dart
+++ b/app/lib/controller/collections_controller.dart
@@ -19,6 +19,7 @@ import 'package:nc_photos/or_null.dart';
 import 'package:nc_photos/rx_extension.dart';
 import 'package:nc_photos/use_case/collection/create_collection.dart';
 import 'package:nc_photos/use_case/collection/edit_collection.dart';
+import 'package:nc_photos/use_case/collection/import_pending_shared_collection.dart';
 import 'package:nc_photos/use_case/collection/list_collection.dart';
 import 'package:nc_photos/use_case/collection/remove_collections.dart';
 import 'package:nc_photos/use_case/collection/share_collection.dart';
@@ -261,6 +262,25 @@ class CollectionsController {
     }
   }
 
+  /// See [ImportPendingSharedCollection]
+  Future<Collection?> importPendingSharedCollection(
+      Collection collection) async {
+    try {
+      final newCollection =
+          await ImportPendingSharedCollection(_c)(account, collection);
+      _dataStreamController.addWithValue((v) => v.copyWith(
+            data: _prepareDataFor([
+              newCollection,
+              ...v.data.map((e) => e.collection),
+            ]),
+          ));
+      return newCollection;
+    } catch (e, stackTrace) {
+      _dataStreamController.addError(e, stackTrace);
+      return null;
+    }
+  }
+
   Future<void> _load() async {
     var lastData = const CollectionStreamEvent(
       data: [],
diff --git a/app/lib/widget/collection_browser/bloc.dart b/app/lib/widget/collection_browser/bloc.dart
index 534a9420..b6cfd1c8 100644
--- a/app/lib/widget/collection_browser/bloc.dart
+++ b/app/lib/widget/collection_browser/bloc.dart
@@ -140,10 +140,11 @@ class _Bloc extends Bloc<_Event, _State> implements BlocTag {
   Future<void> _onImportPendingSharedCollection(
       _ImportPendingSharedCollection ev, Emitter<_State> emit) async {
     _log.info(ev);
-    // pending collections are always ad hoc
-    final newCollection =
-        await ImportPendingSharedCollection(_c)(account, state.collection);
-    emit(state.copyWith(importResult: newCollection));
+    final newCollection = await collectionsController
+        .importPendingSharedCollection(state.collection);
+    if (newCollection != null) {
+      emit(state.copyWith(importResult: newCollection));
+    }
   }
 
   void _onBeginEdit(_BeginEdit ev, Emitter<_State> emit) {