diff --git a/content/xml/document/src/nsXMLDocument.cpp b/content/xml/document/src/nsXMLDocument.cpp
index e49f027f6053..0cd95af23841 100644
--- a/content/xml/document/src/nsXMLDocument.cpp
+++ b/content/xml/document/src/nsXMLDocument.cpp
@@ -353,7 +353,7 @@ nsXMLDocument::GetDoctype(nsIDOMDocumentType** aDocumentType)
 {
   // XXX TBI
   *aDocumentType = nsnull;
-  return NS_ERROR_NOT_IMPLEMENTED;
+  return NS_OK;
 }
  
 NS_IMETHODIMP    
diff --git a/layout/xml/document/src/nsXMLDocument.cpp b/layout/xml/document/src/nsXMLDocument.cpp
index e49f027f6053..0cd95af23841 100644
--- a/layout/xml/document/src/nsXMLDocument.cpp
+++ b/layout/xml/document/src/nsXMLDocument.cpp
@@ -353,7 +353,7 @@ nsXMLDocument::GetDoctype(nsIDOMDocumentType** aDocumentType)
 {
   // XXX TBI
   *aDocumentType = nsnull;
-  return NS_ERROR_NOT_IMPLEMENTED;
+  return NS_OK;
 }
  
 NS_IMETHODIMP