diff --git a/lib/controllers/ApiController.dart b/lib/controllers/ApiController.dart
index b2bccd8..aaa7e0d 100644
--- a/lib/controllers/ApiController.dart
+++ b/lib/controllers/ApiController.dart
@@ -169,6 +169,9 @@ class ApiController {
 
   Future<DiscussionResponse> loadDiscussion(int id, {int lastId, String user}) async {
     var response = await provider.fetchDiscussion(id, lastId: lastId == null ? null : lastId + 1, user: user);
+    if (response.statusCode == 400) {
+      return DiscussionResponse.accessDenied();
+    }
     return DiscussionResponse.fromJson(response.data);
   }
 
diff --git a/lib/model/reponses/DiscussionResponse.dart b/lib/model/reponses/DiscussionResponse.dart
index f2f12e4..90a282e 100644
--- a/lib/model/reponses/DiscussionResponse.dart
+++ b/lib/model/reponses/DiscussionResponse.dart
@@ -6,6 +6,11 @@ class DiscussionResponse {
   List _posts;
   ResponseContext _context;
 
+  DiscussionResponse.accessDenied() {
+    this._discussion = Discussion.fromJson(null);
+    this._posts = [];
+  }
+
   DiscussionResponse.fromJson(Map<String, dynamic> json) {
     this._discussion = Discussion.fromJson(json['discussion_common']);
     this._posts = json['posts'];