diff --git a/scripts/murmur-version.nse b/scripts/murmur-version.nse
index 78685a03f..2726b2ec0 100644
--- a/scripts/murmur-version.nse
+++ b/scripts/murmur-version.nse
@@ -25,6 +25,8 @@ affect the UDP probe used by this script.
 It is possible to get a corrupt user count (usually +1) when doing a
 TCP service scan due to previous service probe connections affecting
 the server.
+
+See http://mumble.sourceforge.net/Protocol.
 ]]
 
 -- @output