diff --git a/lib/has_accounts.rb b/lib/has_accounts.rb
index <HASH>..<HASH> 100644
--- a/lib/has_accounts.rb
+++ b/lib/has_accounts.rb
@@ -1,3 +1,4 @@
 require 'has_accounts/model'
+require 'has_accounts/core_ext/rounding'
 
 require 'has_accounts/railtie' if defined?(::Rails::Railtie)
Include rounding extensions for Rails 3.