diff --git a/modules/clightning.nix b/modules/clightning.nix
index c70ad23..edc42e9 100644
--- a/modules/clightning.nix
+++ b/modules/clightning.nix
@@ -46,7 +46,7 @@ in {
       '';
     };
     bind-addr = mkOption {
-      type = types.addCheck types.str (s: builtins.length (builtins.split ":" s) == 1);
+      type = pkgs.nix-bitcoin.lib.ipv4Address;
       default = "127.0.0.1";
       description = "Set an IP address or UNIX domain socket to listen to";
     };
diff --git a/modules/lnd.nix b/modules/lnd.nix
index 48446d4..998440f 100644
--- a/modules/lnd.nix
+++ b/modules/lnd.nix
@@ -47,7 +47,7 @@ in {
       description = "The data directory for LND.";
     };
     listen = mkOption {
-      type = types.addCheck types.str (s: builtins.length (builtins.split ":" s) == 1);
+      type = pkgs.nix-bitcoin.lib.ipv4Address;
       default = "localhost";
       description = "Bind to given address to listen to peer connections";
     };
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 7986379..7c7adbc 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -14,4 +14,6 @@
   lightning-loop = pkgs.callPackage ./lightning-loop { };
 
   pinned = import ./pinned.nix;
+
+  lib = import ./lib.nix { inherit (pkgs) lib; };
 }
diff --git a/pkgs/lib.nix b/pkgs/lib.nix
new file mode 100644
index 0000000..43dbe45
--- /dev/null
+++ b/pkgs/lib.nix
@@ -0,0 +1,5 @@
+{ lib }:
+{
+  # An address type that checks that there's no port
+  ipv4Address = lib.types.addCheck lib.types.str (s: builtins.length (builtins.split ":" s) == 1);
+}