From 9f25b8deff8e5b8fad8493db421b4639f14d2e5d Mon Sep 17 00:00:00 2001
From: jiblime <47689567+jiblime@users.noreply.github.com>
Date: Wed, 18 Dec 2019 21:40:01 -0800
Subject: [PATCH] Fixes definition error when the deprecated
 MBEDTLS_ZLIB_SUPPORT and ENABLE_ZLIB_SUPPORT macro are defined/enabled for
 zlib support in mbedtls

100% tests passed, 0 tests failed out of 85

https://github.com/ARMmbed/mbedtls/blob/mbedtls-2.19.1/library/ssl_tls.c#L1842

https://github.com/ARMmbed/mbedtls/blob/mbedtls-2.19.1/library/ssl_tls.c#L1862
---
 library/ssl_tls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 6cf7781f2a..51ae9da3c6 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1880,7 +1880,7 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
 
     /* Allocate compression buffer */
 #if defined(MBEDTLS_ZLIB_SUPPORT)
-    if( session->compression == MBEDTLS_SSL_COMPRESS_DEFLATE &&
+    if( ssl->session_negotiate->compression == MBEDTLS_SSL_COMPRESS_DEFLATE &&
         ssl->compress_buf == NULL )
     {
         MBEDTLS_SSL_DEBUG_MSG( 3, ( "Allocating compression buffer" ) );