diff --git a/content/events/public/nsIPrivateDOMEvent.h b/content/events/public/nsIPrivateDOMEvent.h
index 70ed420e145d..1617c054ec15 100644
--- a/content/events/public/nsIPrivateDOMEvent.h
+++ b/content/events/public/nsIPrivateDOMEvent.h
@@ -46,9 +46,8 @@ class nsPresContext;
  * Event listener manager interface.
  */
 #define NS_IPRIVATEDOMEVENT_IID \
-{ /* 25e6626c-8e54-409b-87b5-2beceaac399e */ \
-0x25e6626c, 0x8e54, 0x409b, \
-{0x87, 0xb5, 0x2b, 0xec, 0xea, 0xac, 0x39, 0x9e} }
+{0x5b3543d3, 0x84ed, 0x4b59, \
+{0x95, 0xca, 0xa4, 0x21, 0xf2, 0x59, 0x22, 0x22}}
 
 class nsIDOMEventTarget;
 class nsIDOMEvent;