diff --git a/.github/workflows/plan.yaml b/.github/workflows/plan.yaml
index 0521d2e..1914d89 100644
--- a/.github/workflows/plan.yaml
+++ b/.github/workflows/plan.yaml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: ${{ env.tf_actions_working_dir }}
+        working-directory: "${{ env.TF_ACTIONS_WORKING_DIR }}"
     steps:
       - name: Checkout
         uses: actions/checkout@v4