diff --git a/.github/workflows/docker-build-pr.yml b/.github/workflows/docker-build-pr.yml
index 410fa23..16dc1b9 100644
--- a/.github/workflows/docker-build-pr.yml
+++ b/.github/workflows/docker-build-pr.yml
@@ -27,7 +27,7 @@ jobs:
 
       - name: Set variables
         run: |
-          echo "PR_NUMBER=$${{ github.event.pull_request.number || github.run_number }}" >> $GITHUB_ENV
+          echo "PR_NUMBER=${{ github.event.pull_request.number || github.run_number }}" >> $GITHUB_ENV
           echo "REGISTRY_LOWER=$(echo '${{ env.REGISTRY }}' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
           echo "REPOSITORY_LOWER=$(echo '${{ github.repository }}' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV