diff --git a/.github/workflows/windows-ci.yml b/.github/workflows/windows-ci.yml
index 976a5415a4261..2179fcdbeaba4 100644
--- a/.github/workflows/windows-ci.yml
+++ b/.github/workflows/windows-ci.yml
@@ -57,7 +57,7 @@ jobs:
         id: cache
         uses: actions/cache/restore@v4
         env:
-          HASH: ${{ hashFiles('htdocs/install/**') }}
+          HASH: ${{ hashFiles('htdocs/install/**', 'htdocs/filefunc.inc.php') }}
           KEY_ROOT: ${{ matrix.os }}-${{ env.ckey }}-${{ matrix.php_version }}
         with:
           # See https://github.com/actions/cache/issues/1275#issuecomment-1925217178