diff --git a/src/wp-includes/meta.php b/src/wp-includes/meta.php
index 88edf152cd..94cbdeece6 100644
--- a/src/wp-includes/meta.php
+++ b/src/wp-includes/meta.php
@@ -596,8 +596,7 @@ function get_metadata_raw( $meta_type, $object_id, $meta_key = '', $single = fal
  * @param string $meta_type Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user',
  *                          or any other object type with an associated meta table.
  * @param int    $object_id ID of the object metadata is for.
- * @param string $meta_key  Metadata key. If not specified, retrieve all metadata for
- *                          the specified object. Default empty.
+ * @param string $meta_key  Metadata key.
  * @param bool   $single    Optional. If true, return only the first value of the specified meta_key.
  *                          This parameter has no effect if meta_key is not specified. Default false.
  * @return mixed Single metadata value, or array of values.