diff --git a/README.md b/README.md
index 9434816..29a2684 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ go get github.com/cristalhq/flagx
 ## Example
 
 ```go
-args := []string{"-t", "20s"}
+args := []string{"-t", "20s"} // or os.Args[1:]
 
 var d time.Duration
 fset := flagx.NewFlagSet("testing", os.Stderr)
diff --git a/example_test.go b/example_test.go
index de1368a..ad37bbc 100644
--- a/example_test.go
+++ b/example_test.go
@@ -10,7 +10,7 @@ import (
 )
 
 func ExampleFlagSet() {
-	args := []string{"-t", "20s"}
+	args := []string{"-t", "20s"} // or os.Args[1:]
 
 	var d time.Duration
 	fset := flagx.NewFlagSet("testing", os.Stderr)