diff --git a/libc/kernel/uapi/linux/nfs4.h b/libc/kernel/uapi/linux/nfs4.h
index 9d614ce..ef860e2 100644
--- a/libc/kernel/uapi/linux/nfs4.h
+++ b/libc/kernel/uapi/linux/nfs4.h
@@ -45,6 +45,7 @@
 #define NFS4_FH_VOL_RENAME 0x0008
 #define NFS4_OPEN_RESULT_CONFIRM 0x0002
 #define NFS4_OPEN_RESULT_LOCKTYPE_POSIX 0x0004
+#define NFS4_OPEN_RESULT_PRESERVE_UNLINKED 0x0008
 #define NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK 0x0020
 #define NFS4_SHARE_ACCESS_MASK 0x000F
 #define NFS4_SHARE_ACCESS_READ 0x0001