# error "FALCON_NIC_CFG_OVERRIDE is obsolete and is not supported."
#endif
+#if EFSYS_OPT_FILTER
+/* Support hardware packet filters */
+# error "FILTER requires SIENA or HUNTINGTON or MEDFORD"
+#endif /* EFSYS_OPT_FILTER */
+
#ifdef EFSYS_OPT_MAC_FALCON_GMAC
# error "MAC_FALCON_GMAC is obsolete and is not supported."
#endif