diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index f5b27526a..dec451376 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -188,7 +188,7 @@ class PullRequestsController < ApplicationController
       ActiveRecord::Base.transaction do
         begin
           requests_params = {
-            do: params[:do],
+            Do: params[:do],
             MergeMessageField: params[:body],
             MergeTitleField: params[:title]
           }