diff --git a/include/pear/Calendar/Calendar.php b/include/pear/Calendar/Calendar.php
index 3d5be737..a2194991 100644
--- a/include/pear/Calendar/Calendar.php
+++ b/include/pear/Calendar/Calendar.php
@@ -392,7 +392,7 @@ class Calendar
         return false;
     }
 
-    function legacy_each($array){
+    function legacy_each(&$array){
         $key = key($array);
         $value = current($array);
         $each = is_null($key) ? false : [