diff --git a/flags/flags.go b/flags/flags.go
index f21c8d0..4d79115 100644
--- a/flags/flags.go
+++ b/flags/flags.go
@@ -44,6 +44,10 @@ func (f Flag[Val]) IsSet() bool {
 	}
 }
 
+func (f Arg) IsSet() bool {
+	return f.Val != ""
+}
+
 func HasDashPrefix(s string) bool {
 	return strings.HasPrefix(s, "-")
 }