diff --git a/kex.h b/kex.h
index 209008189..d36e4d150 100644
--- a/kex.h
+++ b/kex.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: kex.h,v 1.89 2018/07/09 21:56:06 markus Exp $ */
+/* $OpenBSD: kex.h,v 1.90 2018/07/10 09:36:58 sf Exp $ */
 
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@@ -63,6 +63,7 @@
 #define	KEX_CURVE25519_SHA256_OLD	"curve25519-sha256@libssh.org"
 
 #define COMP_NONE	0
+/* pre-auth compression (COMP_ZLIB) is only supported in the client */
 #define COMP_ZLIB	1
 #define COMP_DELAYED	2
 
diff --git a/monitor_wrap.c b/monitor_wrap.c
index e970da2e3..f291ac085 100644
--- a/monitor_wrap.c
+++ b/monitor_wrap.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: monitor_wrap.c,v 1.104 2018/07/10 09:13:30 djm Exp $ */
+/* $OpenBSD: monitor_wrap.c,v 1.105 2018/07/10 09:36:58 sf Exp $ */
 /*
  * Copyright 2002 Niels Provos <provos@citi.umich.edu>
  * Copyright 2002 Markus Friedl <markus@openbsd.org>
@@ -84,8 +84,6 @@
 #include "ssherr.h"
 
 /* Imports */
-extern z_stream incoming_stream;
-extern z_stream outgoing_stream;
 extern struct monitor *pmonitor;
 extern struct sshbuf *loginmsg;
 extern ServerOptions options;