diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9acac476c15c86d03c2f5ef05515f25e70579300..d8a692f04156d81646bf422c44ffb09f6a64d180 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3524,7 +3524,7 @@ static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
 		iomap->flags |= IOMAP_F_DIRTY;
 	iomap->bdev = inode->i_sb->s_bdev;
 	iomap->dax_dev = sbi->s_daxdev;
-	iomap->offset = first_block << blkbits;
+	iomap->offset = (u64)first_block << blkbits;
 	iomap->length = (u64)map.m_len << blkbits;
 
 	if (ret == 0) {