diff --git a/etc/codecs.conf b/etc/codecs.conf
index 68db517ab6..df6177d49f 100644
--- a/etc/codecs.conf
+++ b/etc/codecs.conf
@@ -1999,7 +1999,7 @@ videocodec smv2vfw
 videocodec cfhdvfw
   status working
   info "CineForm HD"
-  comment "set registry keys for half-res decoding"
+  comment "windows only" ; set registry keys for half-res decoding
   status working
   fourcc CFHD
   driver vfw
@@ -3488,6 +3488,14 @@ audiocodec ffatrc
   driver ffmpeg
   dll "atrac3"
 
+audiocodec ffsipr
+  info "FFmpeg Sipr/Acelp.net audio"
+  status buggy ; missing 16k support
+  format 0x72706973 ; "sipr"
+  format 0x130 ; acelp.net
+  driver ffmpeg
+  dll "sipr"
+
 audiocodec ra144
   info "RealAudio 1.0"
   status working