diff --git a/contrib/examples/example_app/test_configs/opt_no_udp_ipv6only.h b/contrib/examples/example_app/test_configs/opt_no_udp_ipv6only.h
index 0572798b..7c751932 100644
--- a/contrib/examples/example_app/test_configs/opt_no_udp_ipv6only.h
+++ b/contrib/examples/example_app/test_configs/opt_no_udp_ipv6only.h
@@ -2,3 +2,6 @@
 
 #undef LWIP_UDP
 #define LWIP_UDP 0
+
+#foo
+void x