diff --git a/src/initscripts/init.d/postfix b/src/initscripts/init.d/postfix
index 2620a4eb3..f7fc2dd73 100644
--- a/src/initscripts/init.d/postfix
+++ b/src/initscripts/init.d/postfix
@@ -49,7 +49,7 @@ case "$1" in
 	status)
 		PID=`pidof /usr/lib/postfix/master`
 		MPID=`cat /var/spool/postfix/pid/master.pid`
-		if [ $MPID = $PID ]; then
+		if [ ${MPID} = ${PID} ]; then
 			echo -e "${INFO}postfix is running with Process"\
 			"ID(s) ${MPID}.${NORMAL}"
 		fi