From f04c66294ea47a59ecdded50a06535b3d4679a22 Mon Sep 17 00:00:00 2001
From: Timo Hocker <t-hocker@web.de>
Date: Mon, 18 May 2020 09:55:09 +0200
Subject: [PATCH] fix

---
 lib/Sources/ArgSource.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Sources/ArgSource.ts b/lib/Sources/ArgSource.ts
index 141eb5d..e5ebc27 100644
--- a/lib/Sources/ArgSource.ts
+++ b/lib/Sources/ArgSource.ts
@@ -49,7 +49,7 @@ export class ArgSource extends OptionSource {
     }
 
     await Promise.all (options.map ((opt) => {
-      if (argv[opt.name] === 'undefined')
+      if (typeof argv[opt.name] === 'undefined')
         return Promise.resolve ();
       if (
         opt.type === 'array'