diff --git a/src/js/tabs/firmware_flasher.js b/src/js/tabs/firmware_flasher.js
index 3ff24b7318c..c0c80941f6f 100644
--- a/src/js/tabs/firmware_flasher.js
+++ b/src/js/tabs/firmware_flasher.js
@@ -575,10 +575,10 @@ firmware_flasher.initialize = function (callback) {
         }
 
         let result = getConfig('erase_chip');
-        if (result.erase_chip) {
+        if (result.erase_chip === undefined) {
             $('input.erase_chip').prop('checked', true);
         } else {
-            $('input.erase_chip').prop('checked', false);
+            $('input.erase_chip').prop('checked', result.erase_chip);
         }
 
         $('input.erase_chip').change(function () {