diff --git a/README.md b/README.md
index ab5d255..e5ab644 100644
--- a/README.md
+++ b/README.md
@@ -163,6 +163,9 @@ cp wp-content/db.php wp-content/db.php.backup
 cp wp-content/plugins/markdown-database-integration/db.php wp-content/db.php
 ```
 
+The bundled drop-in includes the `@studio-keep` marker so WordPress Studio
+preserves it during SQLite integration refreshes.
+
 ## Configuration
 
 Add to `wp-config.php`:
diff --git a/db.php b/db.php
index 6bda691..4797ce9 100644
--- a/db.php
+++ b/db.php
@@ -10,6 +10,7 @@
  *
  * This file goes in wp-content/db.php (replacing the SQLite drop-in's version).
  *
+ * @studio-keep
  * @package Markdown_Database_Integration
  */