diff --git a/jquery.tagsmanager/jquery.tagsmanager-tests.ts b/jquery.tagsmanager/jquery.tagsmanager-tests.ts
index 7dbb161834..9f96c9b1e7 100644
--- a/jquery.tagsmanager/jquery.tagsmanager-tests.ts
+++ b/jquery.tagsmanager/jquery.tagsmanager-tests.ts
@@ -1,21 +1,21 @@
-/// <reference path="../jquery/jquery.d.ts"/>
-/// <reference path="jquery.tagsmanager.d.ts" />
-
-var options: TagsManagerOptions = {
-prefilled: ["Pisa", "Rome"],
-CapitalizeFirstLetter: true,
-preventSubmitOnEnter: true,
-typeahead: true,
-typeaheadAjaxSource: null,
-typeaheadSource: ["Pisa", "Rome", "Milan", "Florence", "New York", "Paris", "Berlin", "London", "Madrid"],
-delimeters: [44, 188, 13],
-backspace: [8],
-blinkBGColor_1: '#FFFF9C',
-blinkBGColor_2: '#CDE69C',
-hiddenTagListName: 'hiddenTagListA'
-};
-
-jQuery(".tagManager").tagsManager(options);
-jQuery(".tagManager").tagsManager('popTag');
-jQuery(".tagManager").tagsManager('pushTag', 'I_am_a_new_tag');
-jQuery(".tagManager").tagsManager('empty');
+/// <reference path="../jquery/jquery.d.ts"/>
+/// <reference path="jquery.tagsmanager.d.ts" />
+
+var options: ITagsManagerOptions = {
+	prefilled: ["Pisa", "Rome"],
+	CapitalizeFirstLetter: true,
+	preventSubmitOnEnter: true,
+	typeahead: true,
+	typeaheadAjaxSource: null,
+	typeaheadSource: ["Pisa", "Rome", "Milan", "Florence", "New York", "Paris", "Berlin", "London", "Madrid"],
+	delimeters: [44, 188, 13],
+	backspace: [8],
+	blinkBGColor_1: '#FFFF9C',
+	blinkBGColor_2: '#CDE69C',
+	hiddenTagListName: 'hiddenTagListA'
+};
+
+jQuery(".tagManager").tagsManager(options);
+jQuery(".tagManager").tagsManager('popTag');
+jQuery(".tagManager").tagsManager('pushTag', 'I_am_a_new_tag');
+jQuery(".tagManager").tagsManager('empty');
diff --git a/jquery.tagsmanager/jquery.tagsmanager.d.ts b/jquery.tagsmanager/jquery.tagsmanager.d.ts
index ff5549cea8..1f48744def 100644
--- a/jquery.tagsmanager/jquery.tagsmanager.d.ts
+++ b/jquery.tagsmanager/jquery.tagsmanager.d.ts
@@ -28,7 +28,7 @@ interface ITagsManagerOptions {
     tagsContainer?: HTMLElement;
     tagCloseIcon?: string;
     tagClass?: string;
-    validator: Function;
+    validator?: Function;
 }
 
 interface ITypeaheadOverrides {