diff --git a/scripts/global_update_monitor.sh b/scripts/global_update_monitor.sh
index 6d073a1..bceb2e8 100755
--- a/scripts/global_update_monitor.sh
+++ b/scripts/global_update_monitor.sh
@@ -33,7 +33,7 @@ if ps u -C global_update.sh > /dev/null; then
     echo "* $NUM instances of global_update.sh still running (WARNING)"
     PIDS=`ps u -C global_update.sh | tail -n +2  | awk '{print $2}' | xargs`
     echo "  Running PIDs: $PIDS"
-    if [[ $KILL=="YES" ]];then
+    if [ "$KILL=="YES" ];then
         echo "  KILL mode enabled, killing running global_update.sh instances"
         echo "       (executing pkill -P $PIDS)"
         pkill -P $PIDS