diff --git a/src/ng/filter/filter.js b/src/ng/filter/filter.js
index 467f6699f394..2ce5d1a3a0e5 100644
--- a/src/ng/filter/filter.js
+++ b/src/ng/filter/filter.js
@@ -82,7 +82,7 @@
  */
 function filterFilter() {
   return function(array, expression) {
-    if (!(array instanceof Array)) return array;
+    if (!(isArray(array))) return array;
     var predicates = [];
     predicates.check = function(value) {
       for (var j = 0; j < predicates.length; j++) {
diff --git a/src/ng/filter/orderBy.js b/src/ng/filter/orderBy.js
index 93f3f5a6977d..93a8fca55c18 100644
--- a/src/ng/filter/orderBy.js
+++ b/src/ng/filter/orderBy.js
@@ -89,7 +89,7 @@
 orderByFilter.$inject = ['$parse'];
 function orderByFilter($parse){
   return function(array, sortPredicate, reverseOrder) {
-    if (!(array instanceof Array)) return array;
+    if (!(isArray(array))) return array;
     if (!sortPredicate) return array;
     sortPredicate = isArray(sortPredicate) ? sortPredicate: [sortPredicate];
     sortPredicate = map(sortPredicate, function(predicate){