diff --git a/mcs/class/System/System.IO/ChangeLog b/mcs/class/System/System.IO/ChangeLog
index ae8fffb932f7a..1007ad2d5f0ae 100644
--- a/mcs/class/System/System.IO/ChangeLog
+++ b/mcs/class/System/System.IO/ChangeLog
@@ -1,7 +1,7 @@
 2006-04-06 Gonzalo Paniagua Javier <gonzalo@ximian.com>
 
 	* FAMWatcher.cs: add new directories to the hashtable after start
-	monitoring them, otherwise the ReqNum is not set. Fixes bug #78029.
+	monitoring them, otherwise the ReqNum is not set. Fixes bug #77971.
 
 2006-01-05 Gonzalo Paniagua Javier <gonzalo@ximian.com>