diff --git a/README.md b/README.md
index f6fa6cb..c2757e7 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,17 @@ per-post basis.
 
 ### Filters
 
+#### `wp_modified_date_control_default_allow_updates`
+
+Modify the default meta value to allow updates to the modified date. By default,
+the plugin will return true and allow updates to the modified date. This filter
+allows you to override that behavior.
+
+```php
+// Disable updates to the modified date by default.
+add_filter( 'wp_modified_date_control_default_allow_updates', fn () => false );
+```
+
 #### `wp_modified_date_control_prevent_updates`
 
 Modify the default behavior of the plugin to allow/deny updates to the modified
diff --git a/src/meta.php b/src/meta.php
index b1ab28c..7c703a2 100644
--- a/src/meta.php
+++ b/src/meta.php
@@ -18,5 +18,11 @@
 	'description'  => __( 'Allow updates to the modified date.', 'wp-modified-date-control' ),
 	'single'       => true,
 	'show_in_rest' => true,
-	'default'      => true, // TODO: Infer from site settings.
+
+	/**
+	 * Filter the default value for allowing updates to the modified date.
+	 *
+	 * @param bool $default The default value.
+	 */
+	'default'      => (bool) apply_filters( 'wp_modified_date_control_default_allow_updates', true ),
 ] );