diff --git a/nixos/modules/services/web-apps/mediawiki.nix b/nixos/modules/services/web-apps/mediawiki.nix
index 0a5b6047bb58..1db1652022a3 100644
--- a/nixos/modules/services/web-apps/mediawiki.nix
+++ b/nixos/modules/services/web-apps/mediawiki.nix
@@ -180,6 +180,7 @@ in
       };
 
       name = mkOption {
+        type = types.str;
         default = "MediaWiki";
         example = "Foobar Wiki";
         description = "Name of the wiki.";