diff --git a/MAINTAINERS b/MAINTAINERS
index eadd59fb75..6358b95110 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -281,6 +281,7 @@ Muxers/Demuxers:
   matroskaenc.c                         David Conrad
   metadata*                             Aurelien Jacobs
   mm.c                                  Peter Ross
+  mmst.c                                Ronald S. Bultje
   mov.c                                 Michael Niedermayer, Baptiste Coudurier
   movenc.c                              Michael Niedermayer, Baptiste Coudurier
   mpc.c                                 Kostya Shishkov