diff --git a/src/support.js b/src/support.js
index 4960930ef..ce764a1ce 100644
--- a/src/support.js
+++ b/src/support.js
@@ -139,7 +139,7 @@ jQuery.support = (function() {
 	}
 
 	div.style.backgroundClip = "content-box";
-	div.cloneNode().style.backgroundClip = "";
+	div.cloneNode( true ).style.backgroundClip = "";
 	support.clearCloneStyle = div.style.backgroundClip === "content-box";
 
 	// Run tests that need a body at doc ready