diff --git a/modules/server/dns/blocky/default.nix b/modules/server/dns/blocky/default.nix
index 13abfec6..c25d808d 100644
--- a/modules/server/dns/blocky/default.nix
+++ b/modules/server/dns/blocky/default.nix
@@ -216,7 +216,7 @@ in {
             "api.twitter.com"
             "mobile.twitter.com"
           ];
-          clientGroupsBlock.default = [ ads ];
+          clientGroupsBlock.default = [ "ads" ];
         };
         customDNS = {
           customTTL = "1h";