diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index e5457892..cefa6bf3 100644
--- a/.github/workflows/pr-build.yml
+++ b/.github/workflows/pr-build.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - main
+      - '*.x'
 
 jobs:
   build-pull-request: