diff --git a/dirname/dirname.go b/dirname/dirname.go
index 7ea5e94..2b9fd6d 100644
--- a/dirname/dirname.go
+++ b/dirname/dirname.go
@@ -8,12 +8,12 @@ import (
 
 func usage() {
 	fmt.Printf("usage: %v path\n", os.Args[0])
+	os.Exit(1)
 }
 
 func main() {
 	if len(os.Args) != 2 {
 		usage()
-		os.Exit(1)
 	}
 
 	fmt.Println(path.Dir(os.Args[1]))