diff --git a/res/res_rtp_asterisk.c b/res/res_rtp_asterisk.c
index 091533e191df1409dc48c697c2c7e5b5791e05bd..f6a0ec08876f336a88b0c0c316d817f122382859 100644
--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -88,13 +88,20 @@
 
 #define TURN_STATE_WAIT_TIME 2000
 
+/*! Full INTRA-frame Request / Fast Update Request (From RFC2032) */
 #define RTCP_PT_FUR     192
+/*! Sender Report (From RFC3550) */
 #define RTCP_PT_SR      AST_RTP_RTCP_SR
+/*! Receiver Report (From RFC3550) */
 #define RTCP_PT_RR      AST_RTP_RTCP_RR
+/*! Source Description (From RFC3550) */
 #define RTCP_PT_SDES    202
+/*! Goodbye (To remove SSRC's from tables) (From RFC3550) */
 #define RTCP_PT_BYE     203
+/*! Application defined (From RFC3550) */
 #define RTCP_PT_APP     204
 /* VP8: RTCP Feedback */
+/*! Payload Specific Feed Back (From RFC4585 also RFC5104) */
 #define RTCP_PT_PSFB    206
 
 #define RTP_MTU		1200