diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5881f2cc5d81..f23977e4ac0f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1902,6 +1902,7 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir,
 	struct nfs4_state *res;
 	int status;
 
+	fmode &= FMODE_READ|FMODE_WRITE;
 	do {
 		status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
 				       &res, ctx_th);