diff --git a/libavformat/rtsp.h b/libavformat/rtsp.h
index 357d3bfc0c..342f825fce 100644
--- a/libavformat/rtsp.h
+++ b/libavformat/rtsp.h
@@ -52,7 +52,7 @@ enum RTSPTransport {
 #define RTSP_DEFAULT_PORT   554
 #define RTSP_MAX_TRANSPORTS 8
 #define RTSP_TCP_MAX_PACKET_SIZE 1472
-#define RTSP_DEFAULT_NB_AUDIO_CHANNELS 2
+#define RTSP_DEFAULT_NB_AUDIO_CHANNELS 1
 #define RTSP_DEFAULT_AUDIO_SAMPLERATE 44100
 #define RTSP_RTP_PORT_MIN 5000
 #define RTSP_RTP_PORT_MAX 10000