diff --git a/src/wp-admin/includes/post.php b/src/wp-admin/includes/post.php
index 4e91dc0e28..3e7e333fbe 100644
--- a/src/wp-admin/includes/post.php
+++ b/src/wp-admin/includes/post.php
@@ -1375,7 +1375,6 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
  *
  * @since 2.9.0
  *
- * @global int   $content_width
  * @global array $_wp_additional_image_sizes
  *
  * @param int $thumbnail_id ID of the attachment used for thumbnail
@@ -1383,7 +1382,7 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
  * @return string html
  */
 function _wp_post_thumbnail_html( $thumbnail_id = null, $post = null ) {
-	global $content_width, $_wp_additional_image_sizes;
+	global $_wp_additional_image_sizes;
 
 	$post               = get_post( $post );
 	$post_type_object   = get_post_type_object( $post->post_type );