diff --git a/functions.php b/functions.php
index d63f9f1d..84af115b 100644
--- a/functions.php
+++ b/functions.php
@@ -53,6 +53,9 @@ function _s_setup() {
 		'default-color' => 'ffffff',
 		'default-image' => '',
 	) ) );
+
+	// Enable support for HTML5 markup.
+	add_theme_support( 'html5', array( 'comment-list', 'search-form', 'comment-form', ) );
 }
 endif; // _s_setup
 add_action( 'after_setup_theme', '_s_setup' );