diff --git a/src/wp-content/themes/twentyseventeen/inc/custom-header.php b/src/wp-content/themes/twentyseventeen/inc/custom-header.php
index 8b33dc4b9c..6e19a7f98b 100644
--- a/src/wp-content/themes/twentyseventeen/inc/custom-header.php
+++ b/src/wp-content/themes/twentyseventeen/inc/custom-header.php
@@ -113,6 +113,7 @@ endif; // End of twentyseventeen_header_style.
  * Customize video play/pause button in the custom header.
  *
  * @param array $settings Video settings.
+ * @return array The filtered video settings.
  */
 function twentyseventeen_video_controls( $settings ) {
 	$settings['l10n']['play'] = '<span class="screen-reader-text">' . __( 'Play background video', 'twentyseventeen' ) . '</span>' . twentyseventeen_get_svg( array( 'icon' => 'play' ) );