diff --git a/nixos/modules/services/web-apps/nexus.nix b/nixos/modules/services/web-apps/nexus.nix
index b3ad13f4102b..1a97c88900f9 100644
--- a/nixos/modules/services/web-apps/nexus.nix
+++ b/nixos/modules/services/web-apps/nexus.nix
@@ -46,7 +46,7 @@ in
       };
 
       listenPort = mkOption {
-        type = types.int;
+        type = types.port;
         default = 8081;
         description = "Port to listen on.";
       };