diff --git a/src/manipulation/support.js b/src/manipulation/support.js
index 2a2dcab23..fd719274e 100644
--- a/src/manipulation/support.js
+++ b/src/manipulation/support.js
@@ -40,7 +40,7 @@ define([
 
 	// #11217 - WebKit loses check when the name is after the checked attribute
 	fragment.appendChild( div );
-	div.innerHTML = "<input type='radio' checked name='t'/>";
+	div.innerHTML = "<input type='radio' checked='checked' name='t'/>";
 
 	// Support: Safari 5.1, iOS 5.1, Android 4.x, Android 2.3
 	// old WebKit doesn't clone checked state correctly in fragments