diff --git a/src/lib/auth/oauth.ts b/src/lib/auth/oauth.ts
index a9a4c16c..d13d05da 100644
--- a/src/lib/auth/oauth.ts
+++ b/src/lib/auth/oauth.ts
@@ -1,4 +1,6 @@
-import { OAUTH_BASE } from '$lib/config'
+import { PUBLIC_SIERO_API_URL } from '$env/static/public'
+
+const OAUTH_BASE = `${PUBLIC_SIERO_API_URL}/oauth`
 
 export interface OAuthLoginResponse {
 	access_token: string
diff --git a/src/lib/config.ts b/src/lib/config.ts
deleted file mode 100644
index e58ca965..00000000
--- a/src/lib/config.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import { PUBLIC_SIERO_OAUTH_URL } from '$env/static/public'
-
-// Single source of truth for env-based URLs
-export const OAUTH_BASE = PUBLIC_SIERO_OAUTH_URL
diff --git a/src/routes/auth/refresh/+server.ts b/src/routes/auth/refresh/+server.ts
index 0ae1ffb0..e537c3d7 100644
--- a/src/routes/auth/refresh/+server.ts
+++ b/src/routes/auth/refresh/+server.ts
@@ -1,6 +1,6 @@
 import type { RequestHandler } from '@sveltejs/kit'
 import { json } from '@sveltejs/kit'
-import { OAUTH_BASE } from '$lib/config'
+import { PUBLIC_SIERO_API_URL } from '$env/static/public'
 import {
 	getRefreshFromCookies,
 	setAccountCookie,
@@ -8,6 +8,8 @@ import {
 	clearAuthCookies
 } from '$lib/auth/cookies'
 
+const OAUTH_BASE = `${PUBLIC_SIERO_API_URL}/oauth`
+
 type OAuthRefreshResponse = {
 	access_token: string
 	token_type: 'Bearer'