diff --git a/lib/omniauth/rails_csrf_protection/railtie.rb b/lib/omniauth/rails_csrf_protection/railtie.rb
index bb299aa..65b85cf 100644
--- a/lib/omniauth/rails_csrf_protection/railtie.rb
+++ b/lib/omniauth/rails_csrf_protection/railtie.rb
@@ -1,3 +1,4 @@
+require "omniauth"
 require "omniauth/rails_csrf_protection/token_verifier"
 
 module OmniAuth