diff --git a/uncrust.go b/uncrust.go
index 2beef5d..2a7f904 100644
--- a/uncrust.go
+++ b/uncrust.go
@@ -24,6 +24,8 @@ var (
 )
 
 func main() {
+	flag.Parse()
+
 	samfile := os.Getenv("samfile")
 	id := os.Getenv("winid")
 	if "" == id {