diff --git a/funcs/func_channel.c b/funcs/func_channel.c
index 548d0590f0..4ae08efc2a 100644
--- a/funcs/func_channel.c
+++ b/funcs/func_channel.c
@@ -224,13 +224,20 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
chan_dahdi provides the following additional options:
+
+ R/O PRI Keypad digits that came in with the SETUP message.
+
- R/O Reverse Charging Indication, one of:
+ R/O PRI Reverse Charging Indication, one of:
-
-
+ None
+ Reverse Charging Requested
+
+ R/O PRI Nonzero if the channel has no B channel.
+ The channel is either on hold or a call waiting call.
+