diff --git a/doc/examples/muxing.c b/doc/examples/muxing.c
index fe1b9ded21..abc14a8910 100644
--- a/doc/examples/muxing.c
+++ b/doc/examples/muxing.c
@@ -39,6 +39,7 @@
 #include <libavutil/opt.h>
 #include <libavutil/mathematics.h>
 #include <libavutil/timestamp.h>
+#include <libavcodec/avcodec.h>
 #include <libavformat/avformat.h>
 #include <libswscale/swscale.h>
 #include <libswresample/swresample.h>