diff --git a/doc/examples/decode_audio.c b/doc/examples/decode_audio.c
index 647893c91f..b56a5ee7f2 100644
--- a/doc/examples/decode_audio.c
+++ b/doc/examples/decode_audio.c
@@ -29,9 +29,10 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "libavcodec/avcodec.h"
-
 #include "libavutil/frame.h"
+#include "libavutil/mem.h"
+
+#include "libavcodec/avcodec.h"
 
 #define AUDIO_INBUF_SIZE 20480
 #define AUDIO_REFILL_THRESH 4096