diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 5afdc4c..d9759af 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -478,6 +478,27 @@
 };
 typedef struct mbedtls_ssl_key_set mbedtls_ssl_key_set;
 
+typedef struct
+{
+    unsigned char binder_key                  [ MBEDTLS_MD_MAX_SIZE ];
+    unsigned char client_early_traffic_secret [ MBEDTLS_MD_MAX_SIZE ];
+    unsigned char early_exporter_master_secret[ MBEDTLS_MD_MAX_SIZE ];
+} mbedtls_ssl_tls1_3_early_secrets;
+
+typedef struct
+{
+    unsigned char client_handshake_traffic_secret[ MBEDTLS_MD_MAX_SIZE ];
+    unsigned char server_handshake_traffic_secret[ MBEDTLS_MD_MAX_SIZE ];
+} mbedtls_ssl_tls1_3_handshake_secrets;
+
+typedef struct
+{
+    unsigned char client_application_traffic_secret_N[ MBEDTLS_MD_MAX_SIZE ];
+    unsigned char server_application_traffic_secret_N[ MBEDTLS_MD_MAX_SIZE ];
+    unsigned char exporter_master_secret             [ MBEDTLS_MD_MAX_SIZE ];
+    unsigned char resumption_master_secret           [ MBEDTLS_MD_MAX_SIZE ];
+} mbedtls_ssl_tls1_3_application_secrets;
+
 /*
  * This structure contains the parameters only needed during handshake.
  */
@@ -682,6 +703,8 @@
         unsigned char handshake[MBEDTLS_MD_MAX_SIZE];
         unsigned char app      [MBEDTLS_MD_MAX_SIZE];
     } tls13_master_secrets;
+
+    mbedtls_ssl_tls1_3_handshake_secrets tls13_hs_secrets;
 #endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)