diff --git a/.github/workflows/job_sync.yml b/.github/workflows/job_sync.yml
index dac3f14..8181eb3 100644
--- a/.github/workflows/job_sync.yml
+++ b/.github/workflows/job_sync.yml
@@ -25,7 +25,7 @@ jobs:
         dst_hash=$(git ls-remote ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} refs/heads/master | cut -f1)
         echo "src_hash=$src_hash"
         echo "dst_hash=$dst_hash"
-        if [ "$src_hash" != "$dst_hash" ]; then
+        if [ "$src_hash" != "$dst_hash" -a "$src_hash" != "" -a "" != "$dst_hash" ]; then
           echo "sync_needed=true" >> $GITHUB_OUTPUT
         else
           echo "sync_needed=false" >> $GITHUB_OUTPUT