diff --git a/src/Angular.js b/src/Angular.js
index 4b9279070417..f4b9f42f1b45 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -1062,7 +1062,7 @@ function parseKeyValue(/**string*/keyValue) {
 function toKeyValue(obj) {
   var parts = [];
   forEach(obj, function(value, key) {
-    if (value !== null) {
+    if (value !== null && !isUndefined(value)) {
       if (isArray(value)) {
         forEach(value, function(arrayValue) {
           parts.push(encodeUriQuery(key, true) +