diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index c99e9058..e61e218 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -587,7 +587,7 @@
 
 	if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {
 		offset <<= (2 * index);
-		offset /= sb->s_blocksize;
+		offset >>= sb->s_blocksize_bits;
 		return offset;
 	}