diff --git a/etc/services.append b/etc/services.append
index 9b66914f3..c025375b5 100644
--- a/etc/services.append
+++ b/etc/services.append
@@ -25,3 +25,5 @@ kf		2110/tcp			# forward credentials
 kx		2111/tcp			# X over kerberos
 kip		2112/tcp			# IP over kerberos
 kauth		2120/tcp			# Remote kauth
+iprop		2121/tcp			# incremental propagation
+krb524		4444/udp			# MIT 5->4