diff --git a/.github/workflows/check-clang-windows.yml b/.github/workflows/check-clang-windows.yml
index a1e740c..aef67e7 100644
--- a/.github/workflows/check-clang-windows.yml
+++ b/.github/workflows/check-clang-windows.yml
@@ -47,7 +47,7 @@ env:
 jobs:
   test_CheckedC_Clang_on_windows :
     name: Build Checked C clang and test it on Windows
-    runs-on: { self-hosted, Windows, X64 }
+    runs-on: [ self-hosted, Windows, X64 ]
     steps:
       - name: Checkout Checked C Clang code
         uses: actions/checkout@v2