diff --git a/extension/Userscripts Extension/Resources/background.js b/extension/Userscripts Extension/Resources/background.js
index 2c52cc41..941e8316 100644
--- a/extension/Userscripts Extension/Resources/background.js	
+++ b/extension/Userscripts Extension/Resources/background.js	
@@ -564,7 +564,7 @@ browser.runtime.onMessage.addListener((request, sender, sendResponse) => {
             const key = `${request.filename}---${request.key}`;
             browser.storage.local.get(key, item => {
                 if (Object.keys(item).length === 0) {
-                    if (request.defaultValue) {
+                    if (request.defaultValue !== undefined) {
                         sendResponse(request.defaultValue);
                     } else {
                         sendResponse(`undefined--${request.pid}`);