diff --git a/assets/script.js b/assets/script.js
index fce9d3a..4e92912 100644
--- a/assets/script.js
+++ b/assets/script.js
@@ -604,7 +604,7 @@ async function getFileList() {
         }
     };
     xhr.send(formData);
-    until(_ => (tmp !== undefined));
+    until(_ => (tmp === undefined));
     return tmp;
 }