diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index ccf382e..6fe0414 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2666,6 +2666,9 @@
 #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
 
 #if defined(MBEDTLS_SSL_RECORD_SIZE_LIMIT)
+#define MBEDTLS_SSL_RECORD_SIZE_LIMIT_EXTENSION_DATA_LENGTH (2)
+#define MBEDTLS_SSL_RECORD_SIZE_LIMIT_MIN (64)
+
 MBEDTLS_CHECK_RETURN_CRITICAL
 int mbedtls_ssl_tls13_parse_record_size_limit_ext(mbedtls_ssl_context *ssl,
                                                   const unsigned char *buf,