diff --git a/.github/workflows/reusable-windows-msi.yml b/.github/workflows/reusable-windows-msi.yml
index d0d53dba0b45d1..7ddf7040e913ac 100644
--- a/.github/workflows/reusable-windows-msi.yml
+++ b/.github/workflows/reusable-windows-msi.yml
@@ -25,3 +25,4 @@ jobs:
         persist-credentials: false
     - name: Build CPython installer
       run: .\Tools\msi\build.bat --doc -"${ARCH}"
+      shell: bash