diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index 24c370769d..4a97f445ef 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -1557,9 +1557,12 @@ function img_caption_shortcode( $attr, $content = null ) {
}
if ( ! empty( $atts['id'] ) ) {
- $atts['id'] = 'id="' . esc_attr( sanitize_html_class( $atts['id'] ) ) . '" ';
+ $att_id = esc_attr( sanitize_html_class( $atts['id'] ) );
+ $atts['id'] = 'id="' . $att_id . '" ';
}
+ $caption_id = 'caption-' . str_replace( '_', '-', $att_id );
+
$class = trim( 'wp-caption ' . $atts['align'] . ' ' . $atts['class'] );
$html5 = current_theme_supports( 'html5', 'caption' );
@@ -1590,13 +1593,15 @@ function img_caption_shortcode( $attr, $content = null ) {
if ( $html5 ) {
$html = sprintf(
- '',
+ '',
$atts['id'],
$style,
esc_attr( $class ),
+ $caption_id,
do_shortcode( $content ),
sprintf(
- '