diff --git a/include/pear/Calendar/Validator.php b/include/pear/Calendar/Validator.php
index 461adbfa..e46c8903 100644
--- a/include/pear/Calendar/Validator.php
+++ b/include/pear/Calendar/Validator.php
@@ -261,7 +261,7 @@ class Calendar_Validator
         return true;
     }
 
-    function legacy_each($array){
+    function legacy_each(&$array){
         $key = key($array);
         $value = current($array);
         $each = is_null($key) ? false : [