diff --git a/lib/dns/rpz.c b/lib/dns/rpz.c
index 92eda66b9f..90832b34d1 100644
--- a/lib/dns/rpz.c
+++ b/lib/dns/rpz.c
@@ -279,6 +279,9 @@ dns_rpz_policy2str(dns_rpz_policy_t policy) {
 	case DNS_RPZ_POLICY_DNS64:
 		str = "DNS64";
 		break;
+	case DNS_RPZ_POLICY_ERROR:
+		str = "ERROR";
+		break;
 	default:
 		UNREACHABLE();
 	}