1 files changed, 1 insertions, 4 deletions
diff --git a/app/controllers/projects/merge_requests/diffs_controller.rb b/app/controllers/projects/merge_requests/diffs_controller.rb
index 9180b3f6b62..98ef9d918ae 100644
--- a/app/controllers/projects/merge_requests/diffs_controller.rb
+++ b/app/controllers/projects/merge_requests/diffs_controller.rb
@@ -122,10 +122,7 @@ class Projects::MergeRequests::DiffsController < Projects::MergeRequests::Applic
       end
     end
 
-    if render_merge_ref_head_diff?
-      return CompareService.new(@project, @merge_request.merge_ref_head.sha)
-        .execute(@project, @merge_request.target_branch)
-    end
+    return @merge_request.merge_head_diff if render_merge_ref_head_diff?
 
     if @start_sha
       @merge_request_diff.compare_with(@start_sha)