diff --git a/src/wp-includes/pluggable.php b/src/wp-includes/pluggable.php
index 197e7a6e91..3835f2afe4 100644
--- a/src/wp-includes/pluggable.php
+++ b/src/wp-includes/pluggable.php
@@ -2017,7 +2017,8 @@ if ( !function_exists('wp_hash') ) :
  *
  * @since 2.0.3
  *
- * @param string $data Plain text to hash
+ * @param string $data   Plain text to hash
+ * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce)
  * @return string Hash of $data
  */
 function wp_hash($data, $scheme = 'auth') {