diff --git a/sentry-raven/spec/raven/json_spec.rb b/sentry-raven/spec/raven/json_spec.rb
index 482b79fb3..9c511c48b 100644
--- a/sentry-raven/spec/raven/json_spec.rb
+++ b/sentry-raven/spec/raven/json_spec.rb
@@ -2,6 +2,7 @@
 # JSON impl we use handles it in the way that we expect.
 
 require 'spec_helper'
+require 'ostruct'
 
 RSpec.describe JSON do
   data = [