--- a/mail/components/history/history.cpp
+++ b/mail/components/history/history.cpp
@@ -77,9 +77,20 @@ History::RegisterVisitedCallback(nsIURI 
 }
 
 NS_IMETHODIMP
 History::UnregisterVisitedCallback(nsIURI *aURI, Link *aLink)
 {
   return NS_OK;
 }
 
+NS_IMETHODIMP
+History::VisitURI(nsIURI *aURI, nsIURI *aLastVisitedURI, PRUint32 aFlags)
+{
+  return NS_OK;
 }
+
+NS_IMETHODIMP
+History::SetURITitle(nsIURI* aURI, const nsAString& aTitle)
+{
+  return NS_OK;
+}
+}