diff --git a/db/migrate/20160830061749_create_solidus_paypal_braintree_sources.rb b/db/migrate/20160830061749_create_solidus_paypal_braintree_sources.rb
index 7f94f3f0..235ea389 100644
--- a/db/migrate/20160830061749_create_solidus_paypal_braintree_sources.rb
+++ b/db/migrate/20160830061749_create_solidus_paypal_braintree_sources.rb
@@ -6,7 +6,7 @@ def change
       t.integer :user_id, index: true
       t.references :payment_method, foreign_key: { to_table: :spree_payment_method }, index: { name: 'index_braintree_source_payment_method' }
 
-      t.timestamps
+      t.timestamps null: false
     end
   end
 end