diff --git a/libmpdemux/demux_real.c b/libmpdemux/demux_real.c
index 99abb03827..4d95311726 100644
--- a/libmpdemux/demux_real.c
+++ b/libmpdemux/demux_real.c
@@ -42,7 +42,7 @@
 #include "config.h"
 #include "mp_msg.h"
 #include "mpbswap.h"
-
+#include "libavutil/common.h"
 #include "stream/stream.h"
 #include "aviprint.h"
 #include "demuxer.h"
@@ -51,8 +51,6 @@
 
 //#define mp_dbg(mod,lev, args... ) mp_msg_c((mod<<8)|lev, ## args )
 
-#define MKTAG(a, b, c, d) (a | (b << 8) | (c << 16) | (d << 24))
-
 #define MAX_STREAMS 32
 
 static unsigned char sipr_swaps[38][2]={