diff --git a/nixos/modules/services/networking/squid.nix b/nixos/modules/services/networking/squid.nix
index 7a6a5cea15fc..bc072c249c56 100644
--- a/nixos/modules/services/networking/squid.nix
+++ b/nixos/modules/services/networking/squid.nix
@@ -145,7 +145,7 @@ in
       };
 
       proxyPort = mkOption {
-        type = types.int;
+        type = types.port;
         default = 3128;
         description = "TCP port on which squid will listen.";
       };