diff --git a/wp-includes/default-filters.php b/wp-includes/default-filters.php
index bd8500e..f67c460 100644
--- a/wp-includes/default-filters.php
+++ b/wp-includes/default-filters.php
@@ -274,6 +274,7 @@ add_action( 'wp_head', 'feed_links_extra', 3 );
 add_action( 'wp_head', 'rsd_link' );
 add_action( 'wp_head', 'wlwmanifest_link' );
 add_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );
+add_action( 'wp_head', 'pingback_link' );
 add_action( 'wp_head', 'locale_stylesheet' );
 add_action( 'publish_future_post', 'check_and_publish_future_post', 10, 1 );
 add_action( 'wp_head', 'noindex', 1 );
diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index 57a7b67..d212e9d 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -2820,6 +2820,15 @@ function rsd_link() {
 }
 
 /**
+ * Display the Pingback URL.
+ *
+ */
+function pingback_link() {
+    if ( is_singular() && pings_open( get_queried_object() ) ) : 
+        echo '<link rel="pingback" href="' . esc_url( get_bloginfo( 'pingback_url' ) ) . '" />' . "\n";
+    endif;
+}
+/**
  * Display the link to the Windows Live Writer manifest file.
  *
  * @link https://msdn.microsoft.com/en-us/library/bb463265.aspx