diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index e6066ddbb3ac..779788622750 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -166,7 +166,7 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
 	unsigned int bdp_flags = (iocb->ki_flags & IOCB_NOWAIT) ? BDP_ASYNC : 0;
 	ssize_t written = 0, ret, ret2;
 	loff_t i_size, pos = iocb->ki_pos, from, to;
-	size_t max_chunk = PAGE_SIZE << MAX_PAGECACHE_ORDER;
+	size_t max_chunk = mapping_max_folio_size(mapping);
 	bool maybe_trouble = false;
 
 	if (unlikely(test_bit(NETFS_ICTX_WRITETHROUGH, &ctx->flags) ||