diff --git a/mozilla/content/html/document/src/nsHTMLDocument.cpp b/mozilla/content/html/document/src/nsHTMLDocument.cpp
index 2404f2ee4d3..28aef2dfa33 100644
--- a/mozilla/content/html/document/src/nsHTMLDocument.cpp
+++ b/mozilla/content/html/document/src/nsHTMLDocument.cpp
@@ -1425,7 +1425,7 @@ nsHTMLDocument::CreateElement(const nsAReadableString& aTagName,
   nsAutoString tmp(aTagName);
   tmp.ToLowerCase();
 
-  mNodeInfoManager->GetNodeInfo(aTagName, nsnull, kNameSpaceID_None,
+  mNodeInfoManager->GetNodeInfo(tmp, nsnull, kNameSpaceID_None,
                                 *getter_AddRefs(nodeInfo));
 
   nsCOMPtr<nsIHTMLContent> content;
diff --git a/mozilla/layout/html/document/src/nsHTMLDocument.cpp b/mozilla/layout/html/document/src/nsHTMLDocument.cpp
index 2404f2ee4d3..28aef2dfa33 100644
--- a/mozilla/layout/html/document/src/nsHTMLDocument.cpp
+++ b/mozilla/layout/html/document/src/nsHTMLDocument.cpp
@@ -1425,7 +1425,7 @@ nsHTMLDocument::CreateElement(const nsAReadableString& aTagName,
   nsAutoString tmp(aTagName);
   tmp.ToLowerCase();
 
-  mNodeInfoManager->GetNodeInfo(aTagName, nsnull, kNameSpaceID_None,
+  mNodeInfoManager->GetNodeInfo(tmp, nsnull, kNameSpaceID_None,
                                 *getter_AddRefs(nodeInfo));
 
   nsCOMPtr<nsIHTMLContent> content;