--- a/jdk/src/share/classes/com/sun/org/apache/xml/internal/security/c14n/implementations/Canonicalizer11.java	Sat Oct 12 10:22:43 2013 +0800
+++ b/jdk/src/share/classes/com/sun/org/apache/xml/internal/security/c14n/implementations/Canonicalizer11.java	Sat Oct 12 20:46:35 2013 -0700
@@ -382,7 +382,8 @@
             } else if (!isVisible(xmlns)) {
                 //There is a definition but the xmlns is not selected by the xpath.
                 //then xmlns=""
-                n = ns.addMappingAndRender(XMLNS, "", nullNode);
+                n = ns.addMappingAndRender(
+                        XMLNS, "", getNullNode(xmlns.getOwnerDocument()));
             }
             //output the xmlns def if needed.
             if (n != null) {