diff --git a/app/validators/domain_name_validator.rb b/app/validators/domain_name_validator.rb
index e39437f2b..be83f0835 100644
--- a/app/validators/domain_name_validator.rb
+++ b/app/validators/domain_name_validator.rb
@@ -38,7 +38,7 @@ class DomainNameValidator < ActiveModel::EachValidator
 
     def validate_blocked(value)
       return true unless value
-      return false if BlockedDomain.where("names @> ?::varchar[]", "{#{value}}").count > 0
+      return false if BlockedDomain.where(name: value).count > 0
       ZonefileSetting.where(origin: value).count == 0
     end
   end