diff --git a/installers/common.sh b/installers/common.sh
index 978bf36..5a4b26c 100644
--- a/installers/common.sh
+++ b/installers/common.sh
@@ -145,7 +145,7 @@ function configure_exit() {
 		sed -i 's#\#ifaddr=#ifaddr=172.16.0.1/16#g' /var/lib/lokinet/lokinet.ini
 		sed -i 's#\#paths=6#paths=8#g' /var/lib/lokinet/lokinet.ini
 		sed -i 's#\#net.ipv4.ip_forward=1#net.ipv4.ip_forward = 1#g' /etc/sysctl.conf
-		if grep -Fxq "172.16.0.1/16" /etc/iptables/rules.v4
+		if grep -Fxq "172.16.0.1" /etc/iptables/rules.v4
 		then
 		    echo -n "iptables entry already exists"
 					else