diff --git a/endpoints/building.py b/endpoints/building.py
index 7af6fcd53..e9153babf 100644
--- a/endpoints/building.py
+++ b/endpoints/building.py
@@ -49,7 +49,7 @@ def start_build(repository, prepared_build, pull_robot_name=None):
 
   # Add the build to the repo's log and spawn the build_queued notification.
   event_log_metadata = {
-    'build_uuid': build_request.uuid,
+    'build_id': build_request.uuid,
     'docker_tags': prepared_build.tags,
     'repo': repository.name,
     'namespace': repository.namespace_user.username,