diff --git a/db/migrate/20150619141200_organization_signup_migration.rb b/db/migrate/20150619141200_organization_signup_migration.rb
index cec72223eb86..dca20600032d 100644
--- a/db/migrate/20150619141200_organization_signup_migration.rb
+++ b/db/migrate/20150619141200_organization_signup_migration.rb
@@ -12,7 +12,7 @@
 
     Rails::Sequel.connection.run(%q{
       ALTER TABLE "organizations"
-      ADD COLUMN whitelisted_email_domains text[]
+      ADD COLUMN whitelisted_email_domains text[] NOT NULL DEFAULT ARRAY[]::text[]
     })
 
     alter_table :users do