diff --git a/bin/sys_refresh_ref_cron.sh b/bin/sys_refresh_ref_cron.sh
index f5dafab..e5b126b 100755
--- a/bin/sys_refresh_ref_cron.sh
+++ b/bin/sys_refresh_ref_cron.sh
@@ -151,10 +151,10 @@ function get_cronjobs
         COLOR="blanc"
         MESSAGE="      - ${CRONJOB}"
         case ${CRONJOB} in
-        "*run-parts*")
+        '*run-parts*')
           COLOR="cyan"
         ;;
-        "*no crontab for*")
+        '*no crontab for*')
           COLOR="bleu"
         ;;
         esac