diff --git a/.github/workflows/pragmaonce.yml b/.github/workflows/pragmaonce.yml
new file mode 100644
index 0000000000000..9a6221379853e
--- /dev/null
+++ b/.github/workflows/pragmaonce.yml
@@ -0,0 +1,18 @@
+name: pragma-once checker
+
+on: [pull_request_target]
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        ref: ${{ github.event.pull_request.head.sha }}
+        persist-credentials: false
+
+    - name: Run pragma check
+      id: pragma_check
+      run: |
+        git grep -l '#pragma once' -- '*.h' && exit 1