diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1
index 73bed3a88e..103757a274 100644
--- a/DOCS/man/en/mplayer.1
+++ b/DOCS/man/en/mplayer.1
@@ -10534,6 +10534,8 @@ MPEG-4 format
 MPEG-4 format with extra header flags required by Apple iPod firmware
 .IPs "dv\ \ \ "
 Sony Digital Video container
+.IPs "matroska\ \ \ "
+Matroska
 .RE
 .PD 1
 .TP