diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 9202300..672659d 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -59,35 +59,6 @@
 #define inline __inline
 #endif
 
-/* Legacy minor version numbers as defined by:
- * - RFC 2246: ProtocolVersion version = { 3, 1 };     // TLS v1.0
- * - RFC 4346: ProtocolVersion version = { 3, 2 };     // TLS v1.1
- *
- * We no longer support these versions, but some code still references those
- * constants as part of negotiating with the peer, so keep them available
- * internally.
- */
-#define MBEDTLS_SSL_MINOR_VERSION_1             1
-#define MBEDTLS_SSL_MINOR_VERSION_2             2
-
-/* Determine minimum supported version */
-#define MBEDTLS_SSL_MIN_MAJOR_VERSION           MBEDTLS_SSL_MAJOR_VERSION_3
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#define MBEDTLS_SSL_MIN_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_3
-#elif defined(MBEDTLS_SSL_PROTO_TLS1_3)
-#define MBEDTLS_SSL_MIN_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_4
-#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
-
-/* Determine maximum supported version */
-#define MBEDTLS_SSL_MAX_MAJOR_VERSION           MBEDTLS_SSL_MAJOR_VERSION_3
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
-#define MBEDTLS_SSL_MAX_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_4
-#elif defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#define MBEDTLS_SSL_MAX_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_3
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
 /* Shorthand for restartable ECC */
 #if defined(MBEDTLS_ECP_RESTARTABLE) && \
     defined(MBEDTLS_SSL_CLI_C) && \
@@ -1457,10 +1428,10 @@
                           uint32_t *flags );
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
-void mbedtls_ssl_write_version( int major, int minor, int transport,
-                        unsigned char ver[2] );
-void mbedtls_ssl_read_version( int *major, int *minor, int transport,
-                       const unsigned char ver[2] );
+void mbedtls_ssl_write_version( unsigned char version[2], int transport,
+                                mbedtls_ssl_protocol_version tls_version );
+uint16_t mbedtls_ssl_read_version( const unsigned char version[2],
+                                   int transport );
 
 static inline size_t mbedtls_ssl_in_hdr_len( const mbedtls_ssl_context *ssl )
 {