diff --git a/src/as/com/threerings/util/ArrayUtil.as b/src/as/com/threerings/util/ArrayUtil.as
index 2ead45f15..b975a5807 100644
--- a/src/as/com/threerings/util/ArrayUtil.as
+++ b/src/as/com/threerings/util/ArrayUtil.as
@@ -120,15 +120,15 @@ public class ArrayUtil
 
     /**
      * Returns the first item in the array for which the predicate function returns true, or
-     * null if no such item was found. The predicate function should be of type:
+     * undefined if no such item was found. The predicate function should be of type:
      *   function (element :*) :Boolean { }
      *
-     * @return the matching element, or null if no matching element was found.
+     * @return the matching element, or undefined if no matching element was found.
      */
     public static function findIf (arr :Array, predicate :Function) :*
     {
         var index :int = (arr != null ? indexIf(arr, predicate) : -1);
-        return (index >= 0 ? arr[index] : null);
+        return (index >= 0 ? arr[index] : undefined);
     }
 
     /**