diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index ee3debf10d..23e0721efa 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -2562,13 +2562,13 @@ function get_post_gallery_images( $post = 0 ) {
 }
 
 /**
- * If an attachment is missing its metadata, try to regenerate it
+ * If an attachment is missing its metadata, try to generate it.
  *
  * @since 3.9.0
  *
  * @param post $attachment Post object.
  */
-function maybe_regenerate_attachment_metadata( $attachment ) {
+function wp_maybe_generate_attachment_metadata( $attachment ) {
 	if ( empty( $attachment ) || ( empty( $attachment->ID ) || ! $attachment_id = (int) $attachment->ID ) ) {
 		return;
 	}
@@ -2577,7 +2577,7 @@ function maybe_regenerate_attachment_metadata( $attachment ) {
 	$meta = wp_get_attachment_metadata( $attachment_id );
 	if ( empty( $meta ) && file_exists( $file ) ) {
 		$_meta = get_post_meta( $attachment_id );
-		$regeneration_lock = 'wp_regenerating_' . $attachment_id;
+		$regeneration_lock = 'wp_generating_att_' . $attachment_id;
 		if ( ! array_key_exists( '_wp_attachment_metadata', $_meta ) && ! get_transient( $regeneration_lock ) ) {
 			set_transient( $regeneration_lock, $file );
 			wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $file ) );