1 files changed, 1 insertions, 0 deletions

diff --git a/buf.h b/buf.h
index a796c92..d142148 100644
--- a/buf.h
+++ b/buf.h
@@ -1,5 +1,6 @@
 #ifndef _BUF_INCLUDE
 #define _BUF_INCLUDE
+#include <stdlib.h>
 
 typedef struct buf_node buf_node;
 typedef struct buf buf;