diff --git a/app/models/member.rb b/app/models/member.rb
index 0c6a886..6e7cf25 100644
--- a/app/models/member.rb
+++ b/app/models/member.rb
@@ -193,6 +193,6 @@ class Member < ActiveRecord::Base
   protected
 
   def validate_role
-    errors.add_on_empty :role if member_roles.empty? && roles.empty?
+    errors.add(:role, :empty) if member_roles.empty? && roles.empty?
   end
 end