diff --git a/lib/webmock/http_lib_adapters/patron_adapter.rb b/lib/webmock/http_lib_adapters/patron_adapter.rb
index e5e227fb..2c97f91a 100644
--- a/lib/webmock/http_lib_adapters/patron_adapter.rb
+++ b/lib/webmock/http_lib_adapters/patron_adapter.rb
@@ -6,7 +6,7 @@
   # patron not found
 end
 
-if defined?(::Patron)
+if defined?(::Patron::Session)
   module WebMock
     module HttpLibAdapters
       class PatronAdapter < ::WebMock::HttpLibAdapter