diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index cc19f47..174bad8 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -562,6 +562,13 @@
     uint16_t mtu;                       /*!<  Handshake mtu, used to fragment outgoing messages */
 #endif /* MBEDTLS_SSL_PROTO_DTLS */
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+    /* TLS 1.3 transforms for 0-RTT and encrypted handshake messages.
+     * Those pointers own the transforms they reference. */
+    mbedtls_ssl_transform *transform_handshake;
+    mbedtls_ssl_transform *transform_earlydata;
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
+
     /*
      * Checksum contexts
      */