diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index 41a85a8532..ee3debf10d 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -875,7 +875,17 @@ function gallery_shortcode( $attr ) {
 	$selector = "gallery-{$instance}";
 
 	$gallery_style = $gallery_div = '';
-	if ( apply_filters( 'use_default_gallery_style', true ) )
+
+	/**
+	 * Filter whether to print default gallery styles.
+	 *
+	 * @since 3.1.0
+	 *
+	 * @param bool $print Whether to print default gallery styles.
+	 *                    Defaults to false if the theme supports HTML5 galleries.
+	 *                    Otherwise, defaults to true.
+	 */
+	if ( apply_filters( 'use_default_gallery_style', ! $html5 ) ) {
 		$gallery_style = "
 		<style type='text/css'>
 			#{$selector} {
@@ -894,10 +904,12 @@ function gallery_shortcode( $attr ) {
 				margin-left: 0;
 			}
 			/* see gallery_shortcode() in wp-includes/media.php */
-		</style>";
+		</style>\n\t\t";
+	}
+
 	$size_class = sanitize_html_class( $size );
 	$gallery_div = "<div id='$selector' class='gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}'>";
-	$output = apply_filters( 'gallery_style', $gallery_style . "\n\t\t" . $gallery_div );
+	$output = apply_filters( 'gallery_style', $gallery_style . $gallery_div );
 
 	$i = 0;
 	foreach ( $attachments as $id => $attachment ) {