--- a/dom/xml/nsXMLContentSink.cpp
+++ b/dom/xml/nsXMLContentSink.cpp
@@ -973,17 +973,17 @@ nsXMLContentSink::HandleStartElement(con
   // Set the attributes on the new content element
   result = AddAttributes(aAtts, content);
 
   if (NS_OK == result) {
     // Store the element
     if (!SetDocElement(nameSpaceID, localName, content) && appendContent) {
       NS_ENSURE_TRUE(parent, NS_ERROR_UNEXPECTED);
 
-      parent->AppendChildTo(content, false);
+      parent->AppendChildTo(content, true);
     }
   }
 
   // Some HTML nodes need DoneCreatingElement() called to initialize
   // properly (eg form state restoration).
   if (nodeInfo->NamespaceID() == kNameSpaceID_XHTML) {
     if (nodeInfo->NameAtom() == nsGkAtoms::input ||
         nodeInfo->NameAtom() == nsGkAtoms::button ||