diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 9b273b8..9aec227 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -1074,6 +1074,7 @@
         MBEDTLS_SSL_DEBUG_MSG(2, ("key exchange mode: psk_ephemeral"));
     } else
     if (ssl_tls13_key_exchange_is_ephemeral_available(ssl)) {
+        ssl->handshake->resume = 0;
         ssl->handshake->key_exchange_mode =
             MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL;
         MBEDTLS_SSL_DEBUG_MSG(2, ("key exchange mode: ephemeral"));