diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index a8132b4..a9244a7 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -41,3 +41,12 @@ Spec::Runner.configure do |config|
   # config.mock_with :flexmock
   # config.mock_with :rr
 end
+
+# require the entire app if we're running under coverage testing,
+# so we measure 0% covered files in the report
+#
+# http://www.pervasivecode.com/blog/2008/05/16/making-rcov-measure-your-whole-rails-app-even-if-tests-miss-entire-source-files/
+if defined?(Rcov)
+  all_app_files = Dir.glob('{app,lib}/**/*.rb')
+  all_app_files.each{|rb| require rb}
+end