diff --git a/CHANGELOG b/CHANGELOG
index 85311029e..a5185626e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,8 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o Fixed the RTSPRequest version probe, which was accidentally modified
+  to say "RTSP/2.0" rather than "RTSP/1.0" in 5.10BETA2. [Matt Selsky]
+
 Nmap 5.10BETA2 [2009-12-24]
 
 o Added 7 new NSE scripts for a grand total of 79! You can learn about
diff --git a/nmap-service-probes b/nmap-service-probes
index 721c669f6..bea9e9200 100644
--- a/nmap-service-probes
+++ b/nmap-service-probes
@@ -5903,7 +5903,7 @@ match pop3 m|^\+OK Citadel POP3 server <\d+@([-\w_.]+)>\r\n-ERR Not logged in\.\
 match tgcmd m|^\d+ \d+ \d+,Invalid command\.\n$| p/tgcmd.exe support daemon/ o/Windows/
 
 ##############################NEXT PROBE##############################
-Probe TCP RTSPRequest q|OPTIONS / RTSP/2.0\r\n\r\n|
+Probe TCP RTSPRequest q|OPTIONS / RTSP/1.0\r\n\r\n|
 rarity 5
 ports 80,554,3052,3372,5000,7070,8080,10000
 fallback GetRequest