diff --git a/app/models/user.rb b/app/models/user.rb
index 8811a65..9522cb3 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -130,7 +130,7 @@ class User < Principal
   scope :having_mail, lambda {|arg|
     addresses = Array.wrap(arg).map {|a| a.to_s.downcase}
     if addresses.any?
-      joins(:email_addresses).where("LOWER(address) IN (?)", addresses).uniq
+      joins(:email_addresses).where("LOWER(#{EmailAddress.table_name}.address) IN (?)", addresses).uniq
     else
       none
     end