diff --git a/webring.nix b/webring.nix
index 4d0049f..48d9f02 100644
--- a/webring.nix
+++ b/webring.nix
@@ -48,7 +48,7 @@ let
   };
 in {
   options = {
-    casuallyblue.services.webring = {
+    casuallyblue.services.webring = mkOption {
       default =  { };
       description = ''
         Instances of the webring to run.