diff --git a/README.md b/README.md
index f7e5c23b..08578f7f 100644
--- a/README.md
+++ b/README.md
@@ -1056,6 +1056,7 @@ end
 
 PaperTrail will call your proc with the current article and store the result in
 the `author_id` column of the `versions` table.
+Don't forget to add any such columns to your `versions` table.
 
 ### Advantages of Metadata