diff --git a/command.go b/command.go
index 3137649..96253b6 100644
--- a/command.go
+++ b/command.go
@@ -128,6 +128,8 @@ func (c Command) Run(ctx *Context) (err error) {
 		} else {
 			err = set.Parse(ctx.Args().Tail())
 		}
+	} else {
+		err = set.Parse(ctx.Args().Tail())
 	}
 
 	if err != nil {