diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 318591b..a4d4b74 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -127,15 +127,8 @@
 
 /*
  * Allow extra bytes for record, authentication and encryption overhead:
- * counter (8) + header (5) + IV(16) + MAC (16-48) + padding (0-256)
- * and allow for a maximum of 1024 of compression expansion if
- * enabled.
+ * counter (8) + header (5) + IV(16) + MAC (16-48) + padding (0-256).
  */
-#if defined(MBEDTLS_ZLIB_SUPPORT)
-#define MBEDTLS_SSL_COMPRESSION_ADD          1024
-#else
-#define MBEDTLS_SSL_COMPRESSION_ADD             0
-#endif
 
 /* This macro determines whether CBC is supported. */
 #if defined(MBEDTLS_CIPHER_MODE_CBC) &&                               \
@@ -185,8 +178,7 @@
 #define MBEDTLS_SSL_MAX_CID_EXPANSION        0
 #endif
 
-#define MBEDTLS_SSL_PAYLOAD_OVERHEAD ( MBEDTLS_SSL_COMPRESSION_ADD +    \
-                                       MBEDTLS_MAX_IV_LENGTH +          \
+#define MBEDTLS_SSL_PAYLOAD_OVERHEAD ( MBEDTLS_MAX_IV_LENGTH +          \
                                        MBEDTLS_SSL_MAC_ADD +            \
                                        MBEDTLS_SSL_PADDING_ADD +        \
                                        MBEDTLS_SSL_MAX_CID_EXPANSION    \
@@ -292,15 +284,6 @@
 }
 #endif
 
-#ifdef MBEDTLS_ZLIB_SUPPORT
-/* Compression buffer holds both IN and OUT buffers, so should be size of the larger */
-#define MBEDTLS_SSL_COMPRESS_BUFFER_LEN (                               \
-        ( MBEDTLS_SSL_IN_BUFFER_LEN > MBEDTLS_SSL_OUT_BUFFER_LEN )      \
-        ? MBEDTLS_SSL_IN_BUFFER_LEN                                     \
-        : MBEDTLS_SSL_OUT_BUFFER_LEN                                    \
-        )
-#endif
-
 /*
  * TLS extension flags (for extensions with outgoing ServerHello content
  * that need it (e.g. for RENEGOTIATION_INFO the server already knows because
@@ -750,14 +733,6 @@
     unsigned char out_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ];
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
 
-    /*
-     * Session specific compression layer
-     */
-#if defined(MBEDTLS_ZLIB_SUPPORT)
-    z_stream ctx_deflate;               /*!<  compression context     */
-    z_stream ctx_inflate;               /*!<  decompression context   */
-#endif
-
 #if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
     /* We need the Hello random bytes in order to re-derive keys from the
      * Master Secret and other session info, see ssl_populate_transform() */