diff --git a/etc/codecs.conf b/etc/codecs.conf
index 87cca89834..92fbaa4249 100644
--- a/etc/codecs.conf
+++ b/etc/codecs.conf
@@ -960,7 +960,7 @@ videocodec ffi263
 videocodec ffh263
   info "FFmpeg H.263+ decoder"
   status working
-  fourcc H263,U263,h263,X263
+  fourcc H263,U263,h263,X263,M263
   fourcc viv1 h263
   fourcc s263
   driver ffmpeg