diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index bc313ac..f8a6310 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -22,6 +22,7 @@
 #include <linux/fs.h>
 #include <linux/mount.h>
 #include <linux/path.h>
+#include <linux/dax.h>
 #include <linux/quotaops.h>
 #include <linux/pagevec.h>
 #include <linux/uio.h>