diff --git a/widget/src/gtk2/mai/nsMaiTopLevel.cpp b/widget/src/gtk2/mai/nsMaiTopLevel.cpp
index f4773bbd5d74..19a231e88660 100644
--- a/widget/src/gtk2/mai/nsMaiTopLevel.cpp
+++ b/widget/src/gtk2/mai/nsMaiTopLevel.cpp
@@ -65,7 +65,8 @@ MaiTopLevel::~MaiTopLevel()
 }
 
 NS_IMETHODIMP
-MaiTopLevel::HandleEvent(PRUint32 aEvent, nsIAccessible *aAccessible)
+MaiTopLevel::HandleEvent(PRUint32 aEvent, nsIAccessible *aAccessible,
+                         AccessibleEventData * aEventData)
 {
     MaiObject *maiObject;