diff --git a/app/views/pull_requests/new.json.jbuilder b/app/views/pull_requests/new.json.jbuilder
index ab0e87135..7d406f684 100644
--- a/app/views/pull_requests/new.json.jbuilder
+++ b/app/views/pull_requests/new.json.jbuilder
@@ -1,5 +1,5 @@
 json.partial! "commons/success"
-json.project_id @project.id
+json.project_id @project.identifier
 json.branches @all_branches
 json.is_fork @is_fork
 json.projects_names @projects_names