diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 80767193..d11e9ba8 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -34,6 +34,8 @@ class UsersController < ApplicationController
       @user = existing_user
     end
 
+    @user.role = User::ADMIN_ROLE unless role_valid?(@user.role)
+
     if @user.save
       UserMailer.invitation_email(@user).deliver_later!