diff --git a/libavformat/rtmppkt.h b/libavformat/rtmppkt.h
index f50996f6d1321f6615044b579684f84189c09c37..2c4f92bbec0dfa9cf729b718238e480bbe08eb19 100644
--- a/libavformat/rtmppkt.h
+++ b/libavformat/rtmppkt.h
@@ -34,6 +34,7 @@
 enum RTMPChannel {
     RTMP_NETWORK_CHANNEL = 2,   ///< channel for network-related messages (bandwidth report, ping, etc)
     RTMP_SYSTEM_CHANNEL,        ///< channel for sending server control messages
+    RTMP_SOURCE_CHANNEL,        ///< channel for sending a/v to server
     RTMP_VIDEO_CHANNEL = 8,     ///< channel for video data
     RTMP_AUDIO_CHANNEL,         ///< channel for audio data
 };