diff --git a/lib/hx509/hxtool-commands.in b/lib/hx509/hxtool-commands.in
index 8061b28a8..1cc0ceb1e 100644
--- a/lib/hx509/hxtool-commands.in
+++ b/lib/hx509/hxtool-commands.in
@@ -186,6 +186,11 @@ command = {
 		type = "flag"
 		help = "missing CRL/OCSP is ok"
 	}
+	option = {
+		long = "time"
+		type = "string"
+		help = "time when to validate the chain"
+	}
 	option = {
 		long = "verbose"
 		short = "v"