diff --git a/src/flag/flag.go b/src/flag/flag.go
index 5e7c07c4ccd299..0ec261b425a01d 100644
--- a/src/flag/flag.go
+++ b/src/flag/flag.go
@@ -308,7 +308,7 @@ type ErrorHandling int
 // These constants cause FlagSet.Parse to behave as described if the parse fails.
 const (
 	ContinueOnError ErrorHandling = iota // Return a descriptive error.
-	ExitOnError                          // Call os.Exit(2).
+	ExitOnError                          // Call os.Exit(2) or for -h/-help Exit(0).
 	PanicOnError                         // Call panic with a descriptive error.
 )