diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 39b7bb1cb8..4da5410053 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -3034,6 +3034,9 @@ function wp_array_slice_assoc( $array, $keys ) {
  * @return array A list of objects or object fields
  */
 function wp_filter_object_list( $list, $args = array(), $operator = 'and', $field = false ) {
+	if ( ! is_array( $list ) )
+		return array();
+
 	$list = wp_list_filter( $list, $args, $operator );
 
 	if ( $field )
@@ -3057,6 +3060,9 @@ function wp_filter_object_list( $list, $args = array(), $operator = 'and', $fiel
  * @return array
  */
 function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
+	if ( ! is_array( $list ) )
+		return array();
+
 	if ( empty( $args ) )
 		return $list;