diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 353fc449c87..7791e71a6ec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -101,7 +101,7 @@ jobs:
       - name: Set commit message env var
         run: |
           # get the sha of the last branch commit
-          if [ ${{ github.event_name }} == "pull_request" ] ; then
+          if [ "${{ github.event_name }}" == "pull_request" ] ; then
             BRANCH_SHA=$(git rev-list --parents -n 1 HEAD | rev | cut -d" " -f 1 | rev)
           fi
             BRANCH_SHA=HEAD