diff --git a/installers/common.sh b/installers/common.sh
index 3428ce46..f57e9245 100755
--- a/installers/common.sh
+++ b/installers/common.sh
@@ -205,7 +205,7 @@ function default_configuration() {
     lines=(
     'echo 1 > \/proc\/sys\/net\/ipv4\/ip_forward #RASPAP'
     'iptables -t nat -A POSTROUTING -j MASQUERADE #RASPAP'
-    'iptables -t nat -A POSTROUTING -s 192.168.50.0/24 ! -d 192.168.50.0/24 -j MASQUERADE #RASPAP'
+    'iptables -t nat -A POSTROUTING -s 192.168.50.0\/24 ! -d 192.168.50.0\/24 -j MASQUERADE #RASPAP'
     )
     
     for line in "${lines[@]}"; do