diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index f41f523a58ad..4831a39632a1 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -229,7 +229,7 @@ void exfat_truncate(struct inode *inode, loff_t size)
 {
 	struct super_block *sb = inode->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
-	unsigned int blocksize = 1 << inode->i_blkbits;
+	unsigned int blocksize = i_blocksize(inode);
 	loff_t aligned_size;
 	int err;