diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index fb579d5..e7800f1 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -234,7 +234,7 @@
      */
     client_age = obfuscated_ticket_age - session->ticket_age_add;
     age_diff = server_age - client_age;
-    if (age_diff < -1000 ||
+    if (age_diff < -MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE ||
         age_diff > MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE) {
         MBEDTLS_SSL_DEBUG_MSG(
             3, ("Ticket age outside tolerance window ( diff = %"