diff --git a/src/env.mjs b/src/env.mjs
index 5c63107f..f9302121 100644
--- a/src/env.mjs
+++ b/src/env.mjs
@@ -15,6 +15,7 @@ export const env = createEnv({
     client: {
         NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY: z.string().min(1),
         NEXT_PUBLIC_DRIVE_LINK: z.string().url().min(1),
+        // Clerk URLs. Redundant, but there is no other way from Clerk.
         NEXT_PUBLIC_CLERK_SIGN_IN_URL: z.literal('/signin'),
         NEXT_PUBLIC_CLERK_SIGN_UP_URL: z.literal('/join'),
         NEXT_PUBLIC_CLERK_AFTER_SIGN_IN_URL: z.literal('/'),