diff --git a/app/controllers/concerns/lti.rb b/app/controllers/concerns/lti.rb
index 61559728..f84c8a04 100644
--- a/app/controllers/concerns/lti.rb
+++ b/app/controllers/concerns/lti.rb
@@ -136,7 +136,7 @@ module Lti
     lti_parameters.save!
 
     session[:consumer_id] = options[:consumer].id
-    session[:external_user_id] = @current_user.external_id
+    session[:external_user_id] = @current_user.id
   end
   private :store_lti_session_data