diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 3a14a58..4f6b448 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -927,6 +927,8 @@
 
     unsigned char exported;
 
+    unsigned char MBEDTLS_PRIVATE(minor_ver);    /*!< The TLS version used in the session. */
+
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 #if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
     mbedtls_x509_crt *MBEDTLS_PRIVATE(peer_cert);       /*!< peer X.509 cert chain */