diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 9d76ee311ddc..088de1355e93 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2391,7 +2391,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
 	if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
 		if ((buflen -= 8) < 0)
 			goto out_resource;
-		WRITE64(~(u64)0);
+		WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
 	}
 	if (bmval0 & FATTR4_WORD0_MAXLINK) {
 		if ((buflen -= 4) < 0)