diff --git a/mm-scripts.sh b/mm-scripts.sh
index 723b382..e253284 100755
--- a/mm-scripts.sh
+++ b/mm-scripts.sh
@@ -907,8 +907,8 @@ MMSETUP(){
 			
 			NEWSUB=`IPprefix_by_netmask ${SUBNET}`
 			REPSUB=`IPprefix_by_netmask ${REPSUB}`
-			sed -i "s/${REPIP}${REPSUB}/${IPADDRESS}${NEWSUB}/g" /etc/netplan/eth0.yaml >/dev/null 2>&1
-			sed -i "s/${REPIP}${REPSUB}/${IPADDRESS}${NEWSUB}/g" /etc/netplan/eth0.yaml >/dev/null 2>&1
+			sed -i "s/${REPIP}\/${REPSUB}/${IPADDRESS}\/${NEWSUB}/g" /etc/netplan/eth0.yaml >/dev/null 2>&1
+			sed -i "s/${REPIP}\/${REPSUB}/${IPADDRESS}\/${NEWSUB}/g" /etc/netplan/eth0.yaml >/dev/null 2>&1
 			
 			[ "${SECDNS}" != "" ] && DNS="${PRIDNS},${SECDNS}" || DNS="${PRIDNS}"
 			[ "${REPSECDNS}" != "" ] && REPDNS="${REPPRIDNS},${REPSECDNS}" || REPDNS="${REPPRIDNS}"