diff --git a/src/middleware/staticFileServingAndDirectoryListings.js b/src/middleware/staticFileServingAndDirectoryListings.js
index d210359..8080307 100644
--- a/src/middleware/staticFileServingAndDirectoryListings.js
+++ b/src/middleware/staticFileServingAndDirectoryListings.js
@@ -773,7 +773,7 @@ module.exports = (req, res, logFacilities, config, next) => {
                             .replace(/>/g, "&gt;")}</a></td><td>${
                             estats.isDirectory()
                               ? "-"
-                              : sizify(estats.size.toString())
+                              : sizify(estats.size)
                           }</td><td>${estats.mtime.toDateString()}</td></tr>\r\n`;
 
                           // Determine the file type and set the appropriate image and alt text
diff --git a/src/utils/sizify.js b/src/utils/sizify.js
index 688ed54..b8780f1 100644
--- a/src/utils/sizify.js
+++ b/src/utils/sizify.js
@@ -1,5 +1,5 @@
 function sizify(bytes, addI) {
-  if (bytes === 0) return "0";
+  if (bytes == 0) return "0";
   if (bytes < 0) bytes = -bytes;
 
   const prefixes = ["", "K", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q"];