diff --git a/env.mjs b/env.mjs
index 44597d022..92a5e8c9c 100644
--- a/env.mjs
+++ b/env.mjs
@@ -21,7 +21,9 @@ export const env = createEnv({
     NEXT_PUBLIC_APP_URL: z.string().min(1),
   },
   runtimeEnv: {
-    NEXTAUTH_URL: process.env.VERCEL_URL ?? process.env.NEXTAUTH_URL,
+    NEXTAUTH_URL: process.env.VERCEL
+      ? process.env.VERCEL_URL
+      : process.env.NEXTAUTH_URL,
     NEXTAUTH_SECRET: process.env.NEXTAUTH_SECRET,
     GITHUB_CLIENT_ID: process.env.GITHUB_CLIENT_ID,
     GITHUB_CLIENT_SECRET: process.env.GITHUB_CLIENT_SECRET,