diff --git a/apps/lib/s_cb.c b/apps/lib/s_cb.c
index 3b3c0dd0b38f5..026315406e298 100644
--- a/apps/lib/s_cb.c
+++ b/apps/lib/s_cb.c
@@ -418,8 +418,13 @@ int ssl_print_tmp_key(BIO *out, SSL *s)
 {
     EVP_PKEY *key;
 
-    if (!SSL_get_peer_tmp_key(s, &key))
+    if (!SSL_get_peer_tmp_key(s, &key)) {
+        if (SSL_version(s) == TLS1_3_VERSION)
+            BIO_printf(out, "Negotiated TLS1.3 group: %s\n",
+                       SSL_group_to_name(s, SSL_get_negotiated_group(s)));
         return 1;
+    }
+
     BIO_puts(out, "Server Temp Key: ");
     switch (EVP_PKEY_get_id(key)) {
     case EVP_PKEY_RSA: