diff --git a/app/models/validations/local_authority_validations.rb b/app/models/validations/local_authority_validations.rb
index f3d57c563..76377d587 100644
--- a/app/models/validations/local_authority_validations.rb
+++ b/app/models/validations/local_authority_validations.rb
@@ -3,7 +3,7 @@ module Validations::LocalAuthorityValidations
     postcode = record.ppostcode_full
     if record.previous_postcode_known? && (postcode.blank? || !postcode.match(POSTCODE_REGEXP))
       record.errors.add :ppostcode_full, I18n.t("validations.postcode")
-      record.errors.add :ppcodenk, I18n.t("validations.postcode")
+      record.errors.add :ppostcodenk, I18n.t("validations.postcode")
     end
   end
 end