diff --git a/library/ssl_tls13_client.c b/library/ssl_tls13_client.c
index 342ec52..0d13222 100644
--- a/library/ssl_tls13_client.c
+++ b/library/ssl_tls13_client.c
@@ -1160,6 +1160,15 @@
     }
     p += ext_len;
 
+#if defined(MBEDTLS_SSL_RECORD_SIZE_LIMIT)
+    ret = mbedtls_ssl_tls13_write_record_size_limit_ext(
+        ssl, MBEDTLS_SSL_IN_CONTENT_LEN, p, end, &ext_len);
+    if (ret != 0) {
+        return ret;
+    }
+    p += ext_len;
+#endif
+
 #if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_EPHEMERAL_ENABLED)
     if (mbedtls_ssl_conf_tls13_some_ephemeral_enabled(ssl)) {
         ret = ssl_tls13_write_key_share_ext(ssl, p, end, &ext_len);