diff --git a/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c b/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c
index 6643b05ee94..46421588fef 100644
--- a/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c
+++ b/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c
@@ -692,7 +692,9 @@ altcp_tls_set_session(struct altcp_pcb *conn, struct altcp_tls_session *session)
   if (session && conn && conn->state) {
     altcp_mbedtls_state_t *state = (altcp_mbedtls_state_t *)conn->state;
     int ret = -1;
+#ifdef MBEDTLS_HAVE_TIME
     if (session->data.MBEDTLS_PRIVATE(start))
+#endif
       ret = mbedtls_ssl_set_session(&state->ssl_context, &session->data);
     return ret < 0 ? ERR_VAL : ERR_OK;
   }
diff --git a/lib/mbedtls/mbedtls_def_config.h b/lib/mbedtls/mbedtls_def_config.h
index d27f017d084..1d2314e90e4 100644
--- a/lib/mbedtls/mbedtls_def_config.h
+++ b/lib/mbedtls/mbedtls_def_config.h
@@ -92,9 +92,6 @@
 
 /* Generic options */
 #define MBEDTLS_ENTROPY_HARDWARE_ALT
-#define MBEDTLS_HAVE_TIME
-#define MBEDTLS_PLATFORM_MS_TIME_ALT
-#define MBEDTLS_PLATFORM_TIME_MACRO rtc_mktime
 #define MBEDTLS_PLATFORM_C
 #define MBEDTLS_SSL_CLI_C
 #define MBEDTLS_SSL_TLS_C