diff --git a/site/_docs/continuous-integration.md b/site/_docs/continuous-integration.md
index 1df22b5f..d559a421 100644
--- a/site/_docs/continuous-integration.md
+++ b/site/_docs/continuous-integration.md
@@ -76,6 +76,7 @@ an explanation of each line.
 language: ruby
 rvm:
 - 2.1
+# Assume bundler is being used, install step will run `bundle install`.
 script: ./script/cibuild
 
 # branch whitelist