diff --git a/lib/travis/api/v3/queries/build.rb b/lib/travis/api/v3/queries/build.rb
index 894c3fdb..aa8ff94b 100644
--- a/lib/travis/api/v3/queries/build.rb
+++ b/lib/travis/api/v3/queries/build.rb
@@ -14,11 +14,8 @@ module Travis::API::V3
     end
 
     def restart(user)
-      payload = {
-        build:  { id: id },
-        user:   { id: user.id }
-      }
-      perform_async(:build_restart, type: 'api'.freeze, payload: JSON.dump(payload))
+      payload = {id: id, user_id: user.id, source: 'api'}
+      perform_async(:build_restart, type: 'api'.freeze, payload: payload)
       payload
     end
   end