diff --git a/.github/workflows/deploy_ghpages.yml b/.github/workflows/deploy_ghpages.yml
index a4a017d5..a971eb98 100644
--- a/.github/workflows/deploy_ghpages.yml
+++ b/.github/workflows/deploy_ghpages.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Cache documentation
-        if: ${{ github.ref_type }} != 'tag'
+        if: github.ref_type != 'tag'
         uses: actions/cache@v3
         env:
           cache-name: cache-documentation