diff --git a/funcs/func_channel.c b/funcs/func_channel.c
index 3005d31b12..793ea3f891 100644
--- a/funcs/func_channel.c
+++ b/funcs/func_channel.c
@@ -69,8 +69,11 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 			Gets or sets variables on the master channel
 		</synopsis>
 		<description>
-			<para>Allows access to the channel which created the current channel, if any.  If the channel is already
-			a master channel, then accesses local channel variables.</para>
+			<para>Allows access to the oldest channel associated with the current
+			channel if it still exists.  If the channel is the master channel or
+			the master channel no longer exists then access local channel variables
+			instead.  In other words, the master channel is the channel identified by
+			the channel's linkedid.</para>
 		</description>
 	</function>
 	<function name="CHANNEL" language="en_US">