diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 0b1ebdd..39522197 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -812,7 +812,9 @@
     (void) ssl;
 #endif
 
-    /* Copy info about negotiated version and extensions */
+    /*
+     * Some data just needs copying into the structure
+     */
 #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) && \
     defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
     transform->encrypt_then_mac = encrypt_then_mac;
@@ -824,6 +826,10 @@
     ((void) minor_ver);
 #endif /* !MBEDTLS_SSL_CONF_FIXED_MINOR_VER */
 
+#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
+    memcpy( transform->randbytes, randbytes, sizeof( transform->randbytes ) );
+#endif
+
     /*
      * Get various info structures
      */