diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index f48028b07c..0c27267991 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -2422,11 +2422,12 @@ function previous_image_link( $size = 'thumbnail', $text = false ) {
  *
  * @see adjacent_image_link()
  *
- * @param string|array $size Optional. Registered image size or flat array of height and width dimensions.
- *                           0 or 'none' will default to 'post_title' or `$text`. Default 'thumbnail'.
+ * @param string|array $size Optional. Image size. Accepts any valid image size, an array of width and
+ *                           height values in pixels (in that order), 0, or 'none'. 0 or 'none' will
+ *                           default to 'post_title' or `$text`. Default 'thumbnail'.
  * @param string       $text Optional. Link text. Default false.
  */
-function next_image_link($size = 'thumbnail', $text = false) {
+function next_image_link( $size = 'thumbnail', $text = false ) {
 	adjacent_image_link(false, $size, $text);
 }