diff --git a/app/controllers/admin/seminars_controller.rb b/app/controllers/admin/seminars_controller.rb
index f2f0dcf..bdd0aad 100644
--- a/app/controllers/admin/seminars_controller.rb
+++ b/app/controllers/admin/seminars_controller.rb
@@ -741,7 +741,7 @@ class Admin::SeminarsController < OrbitAdminController
     if @seminar.seminar_signup_field_sets.where(:field_name.in=>except_attributes).destroy != 0
       @seminar = @seminar.reload
     end
-    SeminarSignup.attribute_names.each do |attr_signup|
+    (SeminarSignup.attribute_names + ['recaptcha']).each do |attr_signup|
       next if except_attributes.include?(attr_signup)
       signup_set = @seminar.seminar_signup_field_sets.select{|v| v.field_name==attr_signup }
       if signup_set.length==0