diff --git a/doc/man/mkvextract.xml b/doc/man/mkvextract.xml
index 6ef1e3476..d29a4fbf4 100644
--- a/doc/man/mkvextract.xml
+++ b/doc/man/mkvextract.xml
@@ -604,6 +604,15 @@ source.mkv
+
+ A_OPUS
+
+
+ Opus tracks are written to OggOpus files.
+
+
+
+
S_TEXT/UTF8