diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c
index 90ade8965b7e..8e23bd6cd0f2 100644
--- a/fs/ntfs3/fslog.c
+++ b/fs/ntfs3/fslog.c
@@ -3937,6 +3937,9 @@ init_log_instance:
 		goto out;
 	}
 
+	log->page_mask = log->page_size - 1;
+	log->page_bits = blksize_bits(log->page_size);
+
 	/* If the file size has shrunk then we won't mount it. */
 	if (l_size < le64_to_cpu(ra2->l_size)) {
 		err = -EINVAL;