diff --git a/app/Http/Controllers/User/ConversationController.php b/app/Http/Controllers/User/ConversationController.php
index b6afdf1587..89c3c0797d 100644
--- a/app/Http/Controllers/User/ConversationController.php
+++ b/app/Http/Controllers/User/ConversationController.php
@@ -104,7 +104,7 @@ public function update(UpdateConversationRequest $request, User $user, Conversat
     {
         abort_unless($request->user()->is($user), 403);
 
-        abort_if($conversation->participants()->where('user_id', '=', User::SYSTEM_USER_ID)->exists(), 403, 'You cannot reply to the system');
+        abort_if($conversation->participants()->withTrashed()->where('user_id', '=', User::SYSTEM_USER_ID)->exists(), 403, 'You cannot reply to the system');
 
         PrivateMessage::create([
             'sender_id'       => $user->id,