diff --git a/server.js b/server.js
index 228270a..c153314 100644
--- a/server.js
+++ b/server.js
@@ -744,7 +744,7 @@ router.get("/images/*", (request, response) => {
 
 router.get("/avatars/*", (request, response, next) => {
   if(!increaseUSERCall(request,response))return
-  res.set('Cache-Control', 'public, max-age=2592000'); //cache it for one month-ish
+  response.set('Cache-Control', 'public, max-age=2592000'); //cache it for one month-ish
   let originalUrl = request.originalUrl.split("?").shift()
   if(fs.existsSync(dir + originalUrl + ".png")) {
     return response.sendFile(dir + originalUrl + ".png");