diff --git a/gr-resemble-diff-mode/gr-resemble-diff-mode.js b/gr-resemble-diff-mode/gr-resemble-diff-mode.js
index a9e1f00..1e94c06 100644
--- a/gr-resemble-diff-mode/gr-resemble-diff-mode.js
+++ b/gr-resemble-diff-mode/gr-resemble-diff-mode.js
@@ -15,7 +15,7 @@
   'use strict';
 
   const DEFAULT_SETTING = {
-    errorType: 'movement',
+    errorType: 'flat',
     largeImageThreshold: 1200,
   };