diff --git a/phoenix-framework/02-CRUD/guide/5_ecto_associations.md b/phoenix-framework/02-CRUD/guide/5_ecto_associations.md
index eabe811..e506f79 100644
--- a/phoenix-framework/02-CRUD/guide/5_ecto_associations.md
+++ b/phoenix-framework/02-CRUD/guide/5_ecto_associations.md
@@ -168,7 +168,7 @@ defmodule UserDemo.Repo.Migrations.CreateUsersTasks do
       add :task_id, references(:tasks)
     end
 
-    create unique_index(:user_tasks, [:user_id, :task_id])
+    create unique_index(:users_tasks, [:user_id, :task_id])
   end
 end
 ```