diff --git a/docs/content/docs/concepts/session-management.mdx b/docs/content/docs/concepts/session-management.mdx
index afcf8e8e61..b82c5d902c 100644
--- a/docs/content/docs/concepts/session-management.mdx
+++ b/docs/content/docs/concepts/session-management.mdx
@@ -258,7 +258,7 @@ export const auth = betterAuth({
     ...options,
     plugins: [
         ...(options.plugins ?? []),
-        customSession(async ({ user, session }) => {
+        customSession(async ({ user, session }, ctx) => {
             // now both user and session will infer the fields added by plugins and your custom fields
             return {
                 user,