diff --git a/apps/s_cb.c b/apps/s_cb.c
index dd3aa74e0..5b5e711bf 100644
--- a/apps/s_cb.c
+++ b/apps/s_cb.c
@@ -981,6 +981,11 @@ void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
         extname = "next protocol";
         break;
 #endif
+#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
+    case TLSEXT_TYPE_application_layer_protocol_negotiation:
+        extname = "application layer protocol negotiation";
+        break;
+#endif
 
     case TLSEXT_TYPE_padding:
         extname = "TLS padding";