diff --git a/fs/devfs-core.c b/fs/devfs-core.c
index 5a120c648..f92a07c43 100644
--- a/fs/devfs-core.c
+++ b/fs/devfs-core.c
@@ -261,7 +261,7 @@ int devfs_remove(struct cdev *cdev)
 }
 
 struct cdev *devfs_add_partition(const char *devname, loff_t offset, loff_t size,
-		int flags, const char *name)
+		unsigned int flags, const char *name)
 {
 	struct cdev *cdev, *new;
 
diff --git a/include/driver.h b/include/driver.h
index bbe789b51..33b82c3e9 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -482,13 +482,13 @@ ssize_t cdev_write(struct cdev *cdev, const void *buf, size_t count, loff_t offs
 int cdev_ioctl(struct cdev *cdev, int cmd, void *buf);
 int cdev_erase(struct cdev *cdev, size_t count, loff_t offset);
 
-#define DEVFS_PARTITION_FIXED		(1 << 0)
-#define DEVFS_PARTITION_READONLY	(1 << 1)
+#define DEVFS_PARTITION_FIXED		(1U << 0)
+#define DEVFS_PARTITION_READONLY	(1U << 1)
 #define DEVFS_IS_PARTITION		(1 << 2)
 #define DEVFS_IS_CHARACTER_DEV		(1 << 3)
 
-struct cdev *devfs_add_partition(const char *devname, loff_t offset, loff_t size,
-		int flags, const char *name);
+struct cdev *devfs_add_partition(const char *devname, loff_t offset,
+		loff_t size, unsigned int flags, const char *name);
 int devfs_del_partition(const char *name);
 
 #define DRV_OF_COMPAT(compat) \