2 files changed, 4 insertions, 0 deletions
diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index 8d17a4ebe..ab1d63cd4 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -11,6 +11,8 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
       if lock.acquired?
         @status = find_existing_status
         process_status if @status.nil?
+      else
+        raise Mastodon::RaceConditionError
       end
     end
 
diff --git a/app/lib/ostatus/activity/creation.rb b/app/lib/ostatus/activity/creation.rb
index dbccc8330..d3a303a0c 100644
--- a/app/lib/ostatus/activity/creation.rb
+++ b/app/lib/ostatus/activity/creation.rb
@@ -15,6 +15,8 @@ class OStatus::Activity::Creation < OStatus::Activity::Base
         @status = find_status(id)
         return [@status, false] unless @status.nil?
         @status = process_status
+      else
+        raise Mastodon::RaceConditionError
       end
     end