diff --git a/bin/check/named-checkconf.c b/bin/check/named-checkconf.c
index e79cbc1823..ed00c3c5dd 100644
--- a/bin/check/named-checkconf.c
+++ b/bin/check/named-checkconf.c
@@ -67,7 +67,7 @@ usage(void) ISC_PLATFORM_NORETURN_POST;
 
 static void
 usage(void) {
-	fprintf(stderr, "usage: %s [-h] [-j] [-p] [-v] [-z] [-t directory] "
+	fprintf(stderr, "usage: %s [-h] [-j] [-p [-x]] [-v] [-z] [-t directory] "
 		"[named.conf]\n", program);
 	exit(1);
 }