diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 52821ffc11f4..5b3720414e34 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -819,7 +819,7 @@ out:
  * %-ENOMEM - Insufficient amount of memory available.
  */
 ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
-				unsigned sisz, size_t nsi)
+				unsigned int sisz, size_t nsi)
 {
 	struct buffer_head *su_bh;
 	struct nilfs_segment_usage *su;
@@ -897,7 +897,7 @@ ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
  * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
  */
 ssize_t nilfs_sufile_set_suinfo(struct inode *sufile, void *buf,
-				unsigned supsz, size_t nsup)
+				unsigned int supsz, size_t nsup)
 {
 	struct the_nilfs *nilfs = sufile->i_sb->s_fs_info;
 	struct buffer_head *header_bh, *bh;
diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h
index b8afd72f2379..35e34c84d4af 100644
--- a/fs/nilfs2/sufile.h
+++ b/fs/nilfs2/sufile.h
@@ -42,9 +42,9 @@ int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);
 int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
 				   unsigned long nblocks, time_t modtime);
 int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
-ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned,
+ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int,
 				size_t);
-ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned , size_t);
+ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned int, size_t);
 
 int nilfs_sufile_updatev(struct inode *, __u64 *, size_t, int, size_t *,
 			 void (*dofunc)(struct inode *, __u64,