diff --git a/script/local.py b/script/local.py
index 08e2b62..87e2e1b 100644
--- a/script/local.py
+++ b/script/local.py
@@ -80,7 +80,7 @@ def get_image():
     roi =  get_roi()
     ip = load_image(img.image)                            
     ret = sub_image(ip, roi[0], roi[1], roi[2], roi[3])
-    grayscale(ret, do_scaling)
+    grayscale(ret, do_scaling=True)
     return ret