diff --git a/app/controllers/tags_controller.rb b/app/controllers/tags_controller.rb
index 0991d22cd..78a58e1db 100644
--- a/app/controllers/tags_controller.rb
+++ b/app/controllers/tags_controller.rb
@@ -18,6 +18,7 @@ def create
  
       redirect_to "/maps/" + @map.slug
     else
+      flash[:error] = "You must be logged in to add tags"
       redirect_to "/login?back_to=/maps/" + @map.slug
     end
   end