diff --git a/include/linux/root_dev.h b/include/linux/root_dev.h
index ea4bc9d13735..ed241aad7c17 100644
--- a/include/linux/root_dev.h
+++ b/include/linux/root_dev.h
@@ -2,6 +2,8 @@
 #define _ROOT_DEV_H_
 
 #include <linux/major.h>
+#include <linux/types.h>
+#include <linux/kdev_t.h>
 
 enum {
 	Root_NFS = MKDEV(UNNAMED_MAJOR, 255),