diff --git a/nmap-service-probes b/nmap-service-probes
index 213a12dbd..81a6783d0 100644
--- a/nmap-service-probes
+++ b/nmap-service-probes
@@ -1035,6 +1035,9 @@ match munin m|^# munin node at ([-\w_.]+)\n$| p/Munin/ h/$1/
 
 match multiplicity m|^MULTIPLICITYP$| p/Stardock Multiplicity KVM daemon/ o/Windows/
 
+match mupdate m|\* OK MUPDATE \"([-.\w]+)\" \"Cyrus Murder\" \"v([-.\w]+)\" \"\(master\)\"\r\n| p/Cyrus Murder Master/ h/$1/ v/$2/
+match mupdate m|\* OK MUPDATE \"([-.\w]+)\" \"Cyrus Murder\" \"v([-.\w]+)\" \"mupdate://([-.\w]+)\"\r\n| p/Cyrus Murder Slave/ h/$1/ v/$2/ i/Master: $3/
+
 softmatch napster m|^1$|
 
 match netop m|^\xd6\x81\x81\0\0\xf9\0\xf9\xee\xe3\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0| p/NetOp Remote Control/
diff --git a/nmap-services b/nmap-services
index 73d7afe87..710ebc904 100644
--- a/nmap-services
+++ b/nmap-services
@@ -1889,6 +1889,8 @@ distccd           3632/tcp   # Distributed compiler daemon
 rendezvous        3689/tcp   # Rendezvous Zeroconf (used by Apple/iTunes)
 udt_os            3900/tcp   # Unidata UDT OS
 udt_os            3900/udp   # Unidata UDT OS
+mupdate           3905/tcp   # Mailbox Update (MUPDATE) protocol    
+mupdate           3905/udp   # Mailbox Update (MUPDATE) protocol
 mapper-nodemgr    3984/tcp   # MAPPER network node manager
 mapper-nodemgr    3984/udp   # MAPPER network node manager
 mapper-mapethd    3985/tcp   # MAPPER TCP/IP server