diff --git a/.github/workflows/pr-comment.yml b/.github/workflows/pr-comment.yml
index 6119c2ee..296664bb 100644
--- a/.github/workflows/pr-comment.yml
+++ b/.github/workflows/pr-comment.yml
@@ -37,7 +37,7 @@ jobs:
           ./.github/workflows/utils.sh unzipArtifact
 
       - name: Post a Comment
-        if: env.PR_NUMBER != ''
+        if: ${{ env.PR_NUMBER != null && env.PR_NUMBER != '' }}
         uses: actions/github-script@v6
         with:
           script: |
@@ -50,4 +50,4 @@ jobs:
           Pending: ${{ env.Pending }}
           Skipped: ${{ env.Skipped }}
           ARTIFACT_URL: ${{ env.ARTIFACT_URL }}
-          JOB_PATH: ${{ env.JOB_PATH }}
\ No newline at end of file
+          JOB_PATH: ${{ env.JOB_PATH }}