diff --git a/guides/source/autoloading_and_reloading_constants.md b/guides/source/autoloading_and_reloading_constants.md
index 0c34cdd504..e750657926 100644
--- a/guides/source/autoloading_and_reloading_constants.md
+++ b/guides/source/autoloading_and_reloading_constants.md
@@ -233,8 +233,7 @@ module StiPreload
             select(inheritance_column).
             distinct.
             pluck(inheritance_column).
-            compact.
-            each(&:constantize)
+            compact
 
         types_in_db.each do |type|
           logger.debug("Preloading STI type #{type}")