diff --git a/db/migrate/20150729135346_create_participations.rb b/db/migrate/20150729135346_create_participations.rb
index e6ed3c2..848f62f 100644
--- a/db/migrate/20150729135346_create_participations.rb
+++ b/db/migrate/20150729135346_create_participations.rb
@@ -1,11 +1,13 @@
 class CreateParticipations < ActiveRecord::Migration
   def change
     create_table :participations do |t|
-      t.references :participant, index: true, foreign_key: true
+      t.references :participant, index: true
       t.references :event, index: true, foreign_key: true
       t.boolean :approved, default: false
 
       t.timestamps null: false
     end
+
+    add_foreign_key :participations, :users, column: :participant_id
   end
 end