fix warning

diff --git a/lib/tunalloc.c b/lib/tunalloc.c
index 053b4a5..b2484b9 100644 (file)
--- a/lib/tunalloc.c
+++ b/lib/tunalloc.c
@@ -11,6 +11,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #include <errno.h>
 #include <sys/socket.h>
 #include <linux/if.h>