diff --git a/jquery.placeholder/jquery.placeholder-tests.ts b/jquery.placeholder/jquery.placeholder-tests.ts
index 072c03721..b0e7629f3 100644
--- a/jquery.placeholder/jquery.placeholder-tests.ts
+++ b/jquery.placeholder/jquery.placeholder-tests.ts
@@ -2,3 +2,7 @@
 /// <reference path="jquery.placeholder.d.ts"/>
 
 $('input').placeholder();
+
+// specify custom class
+$('input').placeholder({ customClass: 'my-placeholder' });
+
diff --git a/jquery.placeholder/jquery.placeholder.d.ts b/jquery.placeholder/jquery.placeholder.d.ts
index b9af72494..d475adfce 100644
--- a/jquery.placeholder/jquery.placeholder.d.ts
+++ b/jquery.placeholder/jquery.placeholder.d.ts
@@ -1,13 +1,12 @@
-// Type definitions for jquery.placeholder.js 2.0.7
+// Type definitions for jquery.placeholder.js 2.1.1
 // Project: https://github.com/mathiasbynens/jquery-placeholder
-// Definitions by: Peter Gill <https://github.com/majorsilence>
+// Definitions by: Peter Gill <https://github.com/majorsilence>, Neil Culver <https://github.com/EnableSoftware>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 /// <reference path="../jquery/jquery.d.ts"/>
 
 interface JQuery {
-
-	placeholder() : void;
-
+    placeholder(options: { customClass: string }) : JQuery
+    placeholder() : JQuery
 }