diff --git a/cipher.c b/cipher.c
index 9c2fbd6cfc3..7d6e7d8c65e 100644
--- a/cipher.c
+++ b/cipher.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cipher.c,v 1.122 2024/08/14 15:42:18 tobias Exp $ */
+/* $OpenBSD: cipher.c,v 1.123 2024/08/23 04:51:00 deraadt Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -143,8 +143,8 @@ const char *
 compression_alg_list(int compression)
 {
 #ifdef WITH_ZLIB
-	return compression ? "zlib@openssh.com,zlib,none" :
-	    "none,zlib@openssh.com,zlib";
+	return compression ? "zlib@openssh.com,none" :
+	    "none,zlib@openssh.com";
 #else
 	return "none";
 #endif
diff --git a/kex.c b/kex.c
index 63aae5d71ee..6b957e5e18f 100644
--- a/kex.c
+++ b/kex.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: kex.c,v 1.186 2024/05/17 00:30:23 djm Exp $ */
+/* $OpenBSD: kex.c,v 1.187 2024/08/23 04:51:00 deraadt Exp $ */
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
@@ -842,8 +842,6 @@ choose_comp(struct sshcomp *comp, char *client, char *server)
 #ifdef WITH_ZLIB
 	if (strcmp(name, "zlib@openssh.com") == 0) {
 		comp->type = COMP_DELAYED;
-	} else if (strcmp(name, "zlib") == 0) {
-		comp->type = COMP_ZLIB;
 	} else
 #endif	/* WITH_ZLIB */
 	if (strcmp(name, "none") == 0) {
diff --git a/kex.h b/kex.h
index 4b3ece669da..6700302137f 100644
--- a/kex.h
+++ b/kex.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: kex.h,v 1.124 2024/08/22 23:11:30 djm Exp $ */
+/* $OpenBSD: kex.h,v 1.125 2024/08/23 04:51:00 deraadt Exp $ */
 
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@@ -66,8 +66,6 @@
 #define	KEX_SNTRUP761X25519_SHA512_OLD	"sntrup761x25519-sha512@openssh.com"
 
 #define COMP_NONE	0
-/* pre-auth compression (COMP_ZLIB) is only supported in the client */
-#define COMP_ZLIB	1
 #define COMP_DELAYED	2
 
 #define CURVE25519_SIZE 32
diff --git a/packet.c b/packet.c
index e6ae2013b2b..486f8515746 100644
--- a/packet.c
+++ b/packet.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: packet.c,v 1.316 2024/08/15 00:51:51 djm Exp $ */
+/* $OpenBSD: packet.c,v 1.317 2024/08/23 04:51:00 deraadt Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1015,9 +1015,8 @@ ssh_set_newkeys(struct ssh *ssh, int mode)
 	/* explicit_bzero(enc->iv,  enc->block_size);
 	   explicit_bzero(enc->key, enc->key_len);
 	   explicit_bzero(mac->key, mac->key_len); */
-	if ((comp->type == COMP_ZLIB ||
-	    (comp->type == COMP_DELAYED &&
-	    state->after_authentication)) && comp->enabled == 0) {
+	if (((comp->type == COMP_DELAYED && state->after_authentication)) &&
+	    comp->enabled == 0) {
 		if ((r = ssh_packet_init_compression(ssh)) < 0)
 			return r;
 		if (mode == MODE_OUT) {
diff --git a/readconf.c b/readconf.c
index 4e3791cb7cc..1d0ba0e723a 100644
--- a/readconf.c
+++ b/readconf.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: readconf.c,v 1.387 2024/05/17 02:39:11 jsg Exp $ */
+/* $OpenBSD: readconf.c,v 1.388 2024/08/23 04:51:00 deraadt Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1002,7 +1002,7 @@ static const struct multistate multistate_pubkey_auth[] = {
 };
 static const struct multistate multistate_compression[] = {
 #ifdef WITH_ZLIB
-	{ "yes",			COMP_ZLIB },
+	{ "yes",			COMP_DELAYED },
 #endif
 	{ "no",				COMP_NONE },
 	{ NULL, -1 }