diff --git a/backend/app.js b/backend/app.js
index 5fab23c..04edd6a 100644
--- a/backend/app.js
+++ b/backend/app.js
@@ -1133,7 +1133,7 @@ async function downloadFileByURL_exec(url, type, options, sessionID = null) {
             return;
         } else if (info) {
             // check if it fits into a category. If so, then get info again using new downloadConfig
-            category = await categories_api.categorize(info);
+            if (!Array.isArray(info)) category = await categories_api.categorize(info);
 
             // set custom output if the category has one and re-retrieve info so the download manager has the right file name
             if (category && category['custom_output']) {