diff --git a/lib/google/api_client.rb b/lib/google/api_client.rb
index 0687bb7ef..874859cf2 100644
--- a/lib/google/api_client.rb
+++ b/lib/google/api_client.rb
@@ -31,7 +31,7 @@ require 'google/api_client/media'
 require 'google/api_client/service_account'
 require 'google/api_client/batch'
 require 'google/api_client/push'
-require 'google/api_client/railtie' if defined?(Rails)
+require 'google/api_client/railtie' if defined?(Rails::Railtie)
 
 module Google