diff --git a/libmpdemux/demux_mkv.c b/libmpdemux/demux_mkv.c
index aa900d343a..d2ee9be643 100644
--- a/libmpdemux/demux_mkv.c
+++ b/libmpdemux/demux_mkv.c
@@ -41,7 +41,6 @@
 #include "subreader.h"
 #include "libvo/sub.h"
 
-#include "libass/ass.h"
 #include "libass/ass_mp.h"
 
 #include "libavutil/common.h"