diff --git a/docs/content/docs/concepts/database.mdx b/docs/content/docs/concepts/database.mdx
index 9210a123a1..c447677de1 100644
--- a/docs/content/docs/concepts/database.mdx
+++ b/docs/content/docs/concepts/database.mdx
@@ -153,8 +153,10 @@ import { mongodbAdapter } from "better-auth/adapters/mongodb";
 
 const client = new MongoClient("mongodb://localhost:27017");
 
+const db = client.db()
+
 export const auth = betterAuth({
-    database: mongodbAdapter(client)
+    database: mongodbAdapter(db)
 })
 ```