diff --git a/src/app/register/page.tsx b/src/app/register/page.tsx
index 4c76191..b7a6b8c 100644
--- a/src/app/register/page.tsx
+++ b/src/app/register/page.tsx
@@ -5,11 +5,11 @@ import { redirect, useRouter } from "next/navigation";
 import { ensureJpg } from "@/image";
 
 function avatarUrlAllowed(url: URL): boolean {
-  let notGithub = url.hostname !== "avatars.githubusercontent.com";
-  let notDiscord = url.hostname !== "cdn.discordapp.com";
+  let github = url.hostname === "avatars.githubusercontent.com";
+  let discord = url.hostname === "cdn.discordapp.com";
 
-  if (!notDiscord && !url.pathname.startsWith("/avatars")) return false;
-  return !(notGithub && notDiscord);
+  if (discord && !url.pathname.startsWith("/avatars")) return false;
+  return github || discord;
 }
 
 export default async function Page({