diff --git a/sunspot/spec/api/session_proxy/retry_5xx_session_proxy_spec.rb b/sunspot/spec/api/session_proxy/retry_5xx_session_proxy_spec.rb
index 94068e8e7..0125a9afa 100644
--- a/sunspot/spec/api/session_proxy/retry_5xx_session_proxy_spec.rb
+++ b/sunspot/spec/api/session_proxy/retry_5xx_session_proxy_spec.rb
@@ -1,4 +1,5 @@
 require File.expand_path('spec_helper', File.dirname(__FILE__))
+require 'uri'
 
 describe Sunspot::SessionProxy::Retry5xxSessionProxy do