fixed #90

demo/war/js/angular-file-upload.js

@@ -66,6 +66,7 @@ angularFileUpload.service('$upload', ['$http', '$rootScope', '$timeout', functio
 		return promise;
 	};
 	this.upload = function(config) {
+		config.headers = config.headers || {};
 		config.headers['Content-Type'] = undefined;
 		config.transformRequest = config.transformRequest || $http.defaults.transformRequest;
 		var formData = new FormData();

dist/angular-file-upload-html5-shim.js

@@ -1,7 +1,7 @@
 /**!
  * AngularJS file upload shim for angular XHR HTML5 browsers
  * @author  Danial  <[email protected]>
- * @version 1.2.2
+ * @version 1.2.3
  */
 if (window.XMLHttpRequest) {
 	if (window.FormData) {

dist/angular-file-upload-shim.js

@@ -1,7 +1,7 @@
 /**!
  * AngularJS file upload shim for HTML5 FormData
  * @author  Danial  <[email protected]>
- * @version 1.2.2
+ * @version 1.2.3
  */
 (function() {
 

dist/angular-file-upload.js

@@ -1,7 +1,7 @@
 /**!
  * AngularJS file upload/drop directive with http post and progress
  * @author  Danial  <[email protected]>
- * @version 1.2.2
+ * @version 1.2.3
  */
 (function() {
 
@@ -66,7 +66,7 @@ angularFileUpload.service('$upload', ['$http', '$rootScope', '$timeout', functio
 		return promise;
 	};
 	this.upload = function(config) {
-        config.headers = config.headers || {};
+		config.headers = config.headers || {};
 		config.headers['Content-Type'] = undefined;
 		config.transformRequest = config.transformRequest || $http.defaults.transformRequest;
 		var formData = new FormData();

package.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-file-upload",
-  "version": "1.2.2",
+  "version": "1.2.3",
   "devDependencies": {
     "grunt": "~0.4.1",
     "grunt-contrib-uglify": "~0.2.7",