diff --git a/lib/ext2fs/rw_bitmaps.c b/lib/ext2fs/rw_bitmaps.c
index cee6142..5b504bf 100644
--- a/lib/ext2fs/rw_bitmaps.c
+++ b/lib/ext2fs/rw_bitmaps.c
@@ -144,9 +144,9 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 	int csum_flag = 0;
 	int do_image = fs->flags & EXT2_FLAG_IMAGE_FILE;
 	unsigned int	cnt;
-	blk_t	blk;
-	blk_t	blk_itr = fs->super->s_first_data_block;
-	blk_t   blk_cnt;
+	blk64_t	blk;
+	blk64_t	blk_itr = fs->super->s_first_data_block;
+	blk64_t   blk_cnt;
 	ext2_ino_t ino_itr = 1;
 	ext2_ino_t ino_cnt;