diff --git a/bin/sys_refresh_ref_cron.sh b/bin/sys_refresh_ref_cron.sh
index 66324d6..c103c86 100755
--- a/bin/sys_refresh_ref_cron.sh
+++ b/bin/sys_refresh_ref_cron.sh
@@ -185,7 +185,7 @@ function refresh_cronjobs
             REQUEST_INSERT_PARAMS="'${VM}', '${TETALAB_USER}', '${MINUTES}',
             '${HOURS}', '${DAYS}', '${DAYSOFWEEKS}', '${COMMAND}'"
             psql -t -h ${DB_HOST} -U ${DB_USER} -d ${DB_DATABASE} -c "insert into ref_cron
-            ('host', 's_user', 'minutes', 'hours', 'days', 'daysofweek', 'command')
+            (\"host\", \"s_user\", \"minutes\", \"hours\", \"days\", \"daysofweek\", \"command\")
             values (${REQUEST_INSERT_PARAMS});"
           else
             fct_message "Cronjob already in database"