diff --git a/guides/source/autoloading_and_reloading_constants.md b/guides/source/autoloading_and_reloading_constants.md
index e750657926326..3b212dab12a23 100644
--- a/guides/source/autoloading_and_reloading_constants.md
+++ b/guides/source/autoloading_and_reloading_constants.md
@@ -230,6 +230,7 @@ module StiPreload
       def preload_sti
         types_in_db = \
           base_class.
+            unscoped.
             select(inheritance_column).
             distinct.
             pluck(inheritance_column).