diff --git a/lib/hx509/hxtool-commands.in b/lib/hx509/hxtool-commands.in
index e96415836..bc2f63629 100644
--- a/lib/hx509/hxtool-commands.in
+++ b/lib/hx509/hxtool-commands.in
@@ -176,6 +176,11 @@ command = {
 		argument = "password"
 		help = "password, prompter, or environment"
 	}
+	option = {
+		long = "allow-proxy-certificate"
+		type = "flag"
+		help = "allow proxy certificates"
+	}
 	option = {
 		long = "missing-revoke"
 		type = "flag"