diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c
index 803f395..736c038 100644
--- a/drivers/dax/dax.c
+++ b/drivers/dax/dax.c
@@ -18,6 +18,7 @@
 #include <linux/dax.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include "dax.h"
 
 static int dax_major;
 static struct class *dax_class;