diff --git a/shandan-browser/src/main/resources/static/js/browser.js b/shandan-browser/src/main/resources/static/js/browser.js
index 8643d96..31f626b 100644
--- a/shandan-browser/src/main/resources/static/js/browser.js
+++ b/shandan-browser/src/main/resources/static/js/browser.js
@@ -644,7 +644,7 @@ function fileSizeFormat(size, initUnit = 'B') {
     const i = units.indexOf(initUnit);
     if (size > 1024 && i < units.length - 1) {
         return fileSizeFormat(size / 1024, units[i + 1]);
-    } else if (size < 1 && i > -1) {
+    } else if (size < 1 && i > 0) {
         return fileSizeFormat(size * 1024, units[i - 1]);
     } else {
         return Math.round(size * 100) / 100 + initUnit;