diff --git a/libavformat/nut.c b/libavformat/nut.c
index 4b41a05f33..e329a510d1 100644
--- a/libavformat/nut.c
+++ b/libavformat/nut.c
@@ -20,6 +20,7 @@
  */
 
 #include "nut.h"
+#include "tree.h"
 
 unsigned long av_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len){
     return av_crc(av_crc04C11DB7, checksum, buf, len);