diff --git a/src/tun.c b/src/tun.c
index b5d1b39..303754b 100644
--- a/src/tun.c
+++ b/src/tun.c
@@ -8,6 +8,7 @@
 
 #include <sys/ioctl.h>
 #include <sys/socket.h>
+#include <sys/uio.h>
 
 #ifdef __linux__
 # include <linux/if.h>