diff --git a/common/debian/contrail-server-manager/debian/postinst b/common/debian/contrail-server-manager/debian/postinst
index a95a3ba74..d90bbce56 100644
--- a/common/debian/contrail-server-manager/debian/postinst
+++ b/common/debian/contrail-server-manager/debian/postinst
@@ -127,7 +127,7 @@ update-rc.d contrail-server-manager defaults
 sed -i "s/__\$IPADDRESS__/$HOST_IP/g" /opt/contrail/server_manager/sm-config.ini
 sed -i "s/127.0.0.1/$HOST_IP/g" /opt/contrail/server_manager/sm-config.ini
 # Set monitoring true as default
-sed -i "s/monitoring * = .*/monitoring               = true/g"
+sed -i "s/monitoring * = .*/monitoring               = true/g" /opt/contrail/server_manager/sm-config.ini
 # Set IP Address in smgr_dhcp_event.py DHCP hook.
 sed -i "s/__\$IPADDRESS__/$HOST_IP/g" /opt/contrail/server_manager/smgr_dhcp_event.py
 sed -i "s/cobbler_username         = cobbler/cobbler_username         = testing/g" /opt/contrail/server_manager/sm-config.ini