diff --git a/backend/package.json b/backend/package.json
index 3321bbe..6bd8695 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.16.14",
+  "version": "2.16.15",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/restful/download.js b/backend/src/restful/download.js
index 10ec82e..2059881 100644
--- a/backend/src/restful/download.js
+++ b/backend/src/restful/download.js
@@ -547,13 +547,12 @@ async function downloadCollection(req, res) {
             } else {
                 subUserInfoOfCol = collection.subUserinfo;
             }
-            res.set(
-                'subscription-userinfo',
-                [subUserInfoOfCol, subUserInfoOfSub]
-                    .filter((i) => i)
-                    .join('; '),
-            );
-
+            const subUserInfo = [subUserInfoOfCol, subUserInfoOfSub]
+                .filter((i) => i)
+                .join('; ');
+            if (subUserInfo) {
+                res.set('subscription-userinfo', subUserInfo);
+            }
             if (platform === 'JSON') {
                 if (resultFormat === 'nezha') {
                     output = nezhaTransform(output);