diff --git a/FAQ b/FAQ
index fc12faebdc..80aace3bd1 100644
--- a/FAQ
+++ b/FAQ
@@ -141,6 +141,18 @@ be fixed in 8.2.4.  It can be safely ignored - the notify has been
 acted on by the slave despite the error message.
 
 
+Q: I keep getting log messages like the following.  Why?
+
+   Dec  4 23:47:59 client 10.0.0.1#1355: updating zone 'example.com/IN':
+   update failed: 'RRset exists (value dependent)' prerequisite not
+   satisfied (NXRRSET)
+
+A: DNS updates allow the update request to test to see if certian
+conditions are met prior to proceeding with the update.  The message
+above is saying that conditions were not met and the update is not
+proceeding.  See doc/rfc/rfc2136.txt for more details on prerequisites.
+
+
 Q: I keep getting log messages like the following.  Why?
 
    Jun 21 12:00:00.000 client 10.0.0.1#1234: update denied