diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index d36042797f..7f3a1db855 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -672,6 +672,7 @@ function wp_default_scripts( $scripts ) {
 	$scripts->add( 'jquery-effects-transfer', "/wp-includes/js/jquery/ui/effect-transfer$suffix.js", array( 'jquery-effects-core' ), '1.13.2', 1 );
 
 	// Widgets
+	$scripts->add( 'jquery-ui-accordion', "/wp-includes/js/jquery/ui/accordion$suffix.js", array( 'jquery-ui-core' ), '1.13.2', 1 );
 	$scripts->add( 'jquery-ui-autocomplete', "/wp-includes/js/jquery/ui/autocomplete$suffix.js", array( 'jquery-ui-menu', 'wp-a11y' ), '1.13.2', 1 );
 	$scripts->add( 'jquery-ui-button', "/wp-includes/js/jquery/ui/button$suffix.js", array( 'jquery-ui-core', 'jquery-ui-controlgroup', 'jquery-ui-checkboxradio' ), '1.13.2', 1 );
 	$scripts->add( 'jquery-ui-datepicker', "/wp-includes/js/jquery/ui/datepicker$suffix.js", array( 'jquery-ui-core' ), '1.13.2', 1 );