diff --git a/db/migrate/20150702195735_create_tasks_categories.rb b/db/migrate/20150702195735_create_tasks_categories.rb
index 1e6ae9c..212a12d 100644
--- a/db/migrate/20150702195735_create_tasks_categories.rb
+++ b/db/migrate/20150702195735_create_tasks_categories.rb
@@ -1,9 +1,8 @@
 class CreateTasksCategories < ActiveRecord::Migration
   def up
     create_table :proposals_discussion_plugin_task_categories, id: false do |t|
-      t.belongs_to :task, index: true
-      t.belongs_to :category, index: true
-
+      t.belongs_to :task, index: { name: 'proposals_discussion_plugin_tc_task_index' }
+      t.belongs_to :category, index: { name: 'proposals_discussion_plugin_tc_cat_index' }
     end
   end
 
--
libgit2 0.21.2