diff --git a/dom/interfaces/html/nsIDOMHTMLMediaElement.idl b/dom/interfaces/html/nsIDOMHTMLMediaElement.idl
index ecbfaa772825..9f850f09b290 100644
--- a/dom/interfaces/html/nsIDOMHTMLMediaElement.idl
+++ b/dom/interfaces/html/nsIDOMHTMLMediaElement.idl
@@ -57,7 +57,7 @@
 #endif
 %}
 
-[scriptable, uuid(925c46e0-3795-11df-9879-0800200c9a66)]
+[scriptable, uuid(f748b7db-4ab9-4370-835d-59f30c8de57c)]
 interface nsIDOMHTMLMediaElement : nsIDOMHTMLElement
 {
   // error state
@@ -72,7 +72,7 @@ interface nsIDOMHTMLMediaElement : nsIDOMHTMLElement
   const unsigned short NETWORK_LOADED = 3;
   const unsigned short NETWORK_NO_SOURCE = 4;
   readonly attribute unsigned short networkState;
-           attribute DomString preload;  
+           attribute DOMString preload;  
   readonly attribute nsIDOMHTMLTimeRanges buffered;
   void load();
   DOMString canPlayType(in DOMString type);