diff --git a/wp-includes/taxonomy.php b/wp-includes/taxonomy.php
index eca8c61156..4050100056 100644
--- a/wp-includes/taxonomy.php
+++ b/wp-includes/taxonomy.php
@@ -4338,13 +4338,14 @@ function get_ancestors( $object_id = 0, $object_type = '', $resource_type = '' )
 	 * Filter a given object's ancestors.
 	 *
 	 * @since 3.1.0
+	 * @since 4.1.0 Introduced the `$resource_type` parameter.
 	 *
 	 * @param array  $ancestors     An array of object ancestors.
 	 * @param int    $object_id     Object ID.
 	 * @param string $object_type   Type of object.
 	 * @param string $resource_type Type of resource $object_type is.
 	 */
-	return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type );
+	return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type );
 }
 
 /**