diff --git a/cd.sh b/cd.sh
index bf6f3ee..ac3d8b7 100644
--- a/cd.sh
+++ b/cd.sh
@@ -5,7 +5,7 @@ cd ./../home/ubuntu/RMUD2
 git fetch
 pid=$(sudo lsof -t -i:2001)
 echo "Existing process: $pid"
-if [[ "$(git rev-parse $BRANCH)" != "$(git rev-parse "$REMOTE/$BRANCH")" ]] || [["$pid" == ""]]; then
+if [[ "$(git rev-parse $BRANCH)" != "$(git rev-parse "$REMOTE/$BRANCH")" ]] || [ -z "$pid"]; then
     rm -rf ./cd.log
     echo "Deploying new changes at $(date): $(git log -1 --pretty=%B)"
     bash start.sh &