diff --git a/example_test.go b/example_test.go
index 571317e..a7dd099 100644
--- a/example_test.go
+++ b/example_test.go
@@ -58,8 +58,9 @@
 }
 
 func ExampleBar_ProxyReader() {
+	// import crand "crypto/rand"
+
 	var total int64 = 1024 * 1024 * 500
-	// crand is "crypto/rand"
 	reader := io.LimitReader(crand.Reader, total)
 
 	p := mpb.New()