diff --git a/lib/copy_file.c b/lib/copy_file.c
index 0ff0435..7083531 100644
--- a/lib/copy_file.c
+++ b/lib/copy_file.c
@@ -3,6 +3,8 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <malloc.h>
+#include <libbb.h>
+
 #define RW_BUF_SIZE	(ulong)4096
 
 /**