diff --git a/src/wp-includes/formatting.php b/src/wp-includes/formatting.php
index 45fb3c35b6..5b3f0b2266 100644
--- a/src/wp-includes/formatting.php
+++ b/src/wp-includes/formatting.php
@@ -4411,7 +4411,7 @@ function esc_url( $url, $protocols = null, $_context = 'display' ) {
  * @param string   $url       The URL to be cleaned.
  * @param string[] $protocols Optional. An array of acceptable protocols.
  *                            Defaults to return value of wp_allowed_protocols().
- * @return string The cleaned URL.
+ * @return string The cleaned $url after the 'clean_url' filter is applied. An empty string is returned if $url specifies a protocol other than those in $protocols, or if $url contains an empty string.
  */
 function esc_url_raw( $url, $protocols = null ) {
 	return esc_url( $url, $protocols, 'db' );