diff --git a/defaults.inc b/defaults.inc
index 2689df11..1326ce6b 100755
--- a/defaults.inc
+++ b/defaults.inc
@@ -25,7 +25,7 @@ M_SRVCOPT=(start stop restart reload enable disable)
 
 source ${PW_FOLDER}/settings.conf
 
-mqtt_conn="/usr/bin/mosquitto_sub -h 127.0.0.1 -u ${PW_MQTT_USER} -P ${PW_MQTT_USER}"
+mqtt_conn="/usr/bin/mosquitto_sub -h 127.0.0.1 -u "'${PW_MQTT_USER}'" -P "'${PW_MQTT_USER}'""
 # mysql_conn="/usr/bin/mysql -h ${PW_MYSQL_HOST} -P 6033 --user=${PW_MYSQL_USER} --password=${PW_MYSQL_PASS}"
 mysql_conn='/usr/bin/mysql'