diff --git a/mkudffs/main.c b/mkudffs/main.c
index 066afac9..3e306acb 100644
--- a/mkudffs/main.c
+++ b/mkudffs/main.c
@@ -43,6 +43,7 @@
 #include <sys/ioctl.h>
 #include <linux/fs.h>
 #include <linux/fd.h>
+#include <sys/sysmacros.h>
 
 #include "mkudffs.h"
 #include "defaults.h"