diff --git a/.github/workflows/pxt-buildpr.yml b/.github/workflows/pxt-buildpr.yml
index b6ea4304..2d2450d6 100644
--- a/.github/workflows/pxt-buildpr.yml
+++ b/.github/workflows/pxt-buildpr.yml
@@ -1,6 +1,6 @@
 name: pxt-buildpr
 
-on: [pullrequest]
+on: [pull_request]
 
 jobs:
   build: