1 files changed, 3 insertions, 5 deletions
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index 69cbff16c..3faa39ab3 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -6562,18 +6562,16 @@ nsIDocument::SetBody(nsGenericHTMLElement* newBody, ErrorResult& rv)
   nsCOMPtr<Element> root = GetRootElement();
 
   // The body element must be either a body tag or a frameset tag. And we must
-  // have a html root tag, otherwise GetBody will not return the newly set
-  // body.
+  // have a root element to be able to add kids to it.
   if (!newBody ||
       !newBody->IsAnyOfHTMLElements(nsGkAtoms::body, nsGkAtoms::frameset) ||
-      !root || !root->IsHTMLElement() ||
-      !root->IsHTMLElement(nsGkAtoms::html)) {
+      !root) {
     rv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
     return;
   }
 
   // Use DOM methods so that we pass through the appropriate security checks.
-  nsCOMPtr<Element> currentBody = GetBodyElement();
+  nsCOMPtr<Element> currentBody = GetBody();
   if (currentBody) {
     root->ReplaceChild(*newBody, *currentBody, rv);
   } else {