diff --git a/Rails.gitignore b/Rails.gitignore
index 2debe997..b4be5c7b 100644
--- a/Rails.gitignore
+++ b/Rails.gitignore
@@ -18,10 +18,8 @@ config/initializers/secret_token.rb
 /.bundle
 /vendor/bundle
 
-# these should be checked in to normalise the environment:
-# Gemfile.lock
-# .ruby-version
-# .ruby-gemset
+# these should all be checked in to normalise the environment:
+# Gemfile.lock, .ruby-version, .ruby-gemset
 
 # unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
 .rvmrc