diff --git a/hosts/dn42-il-gw5/configuration.nix b/hosts/dn42-il-gw5/configuration.nix
index 91a91de..4da7a84 100644
--- a/hosts/dn42-il-gw5/configuration.nix
+++ b/hosts/dn42-il-gw5/configuration.nix
@@ -48,8 +48,10 @@
   networking.firewall.allowedTCPPorts = [
     179
   ];
-  networking.firewall.extraCommands = "ip6tables -A INPUT -p ospfigp -j ACCEPT";
-  networking.firewall.extraCommands = "iptables -A INPUT -p ospfigp -j ACCEPT";
+  networking.firewall.extraCommands = ''
+  ip6tables -A INPUT -p ospfigp -j ACCEPT
+  iptables -A INPUT -p ospfigp -j ACCEPT
+  '';
 
   services.bird2.enable = true;
   services.bird2.config = ''