diff --git a/wp-includes/theme.php b/wp-includes/theme.php
index 957ee1b00d..450b985879 100644
--- a/wp-includes/theme.php
+++ b/wp-includes/theme.php
@@ -1027,8 +1027,9 @@ function get_header_image() {
  */
 function get_header_image_tag( $attr = array() ) {
 	$header = get_custom_header();
+	$header->url = get_header_image();
 
-	if ( empty( $header->url ) ) {
+	if ( ! $header->url ) {
 		return '';
 	}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3e988781f7..a94997c9aa 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta1-39120';
+$wp_version = '4.7-beta1-39121';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.