diff --git a/app/controllers/topics_controller.rb b/app/controllers/topics_controller.rb
index f6f99aa0b0f..95431ad9825 100644
--- a/app/controllers/topics_controller.rb
+++ b/app/controllers/topics_controller.rb
@@ -855,8 +855,11 @@ class TopicsController < ApplicationController
         params[:archetype] == "private_message"
     end
 
-    destination_topic = topic.move_posts(current_user, topic.posts.pluck(:id), args)
-    render_topic_changes(destination_topic)
+    acting_user = current_user
+    hijack(info: "merging topic #{topic_id.inspect} into #{destination_topic_id.inspect}") do
+      destination_topic = topic.move_posts(acting_user, topic.posts.pluck(:id), args)
+      render_topic_changes(destination_topic)
+    end
   end
 
   def move_posts