gedidiff --git a/lib/bundler/rubygems_ext.rb b/lib/bundler/rubygems_ext.rb
index e9c9af2..912743f 100644
--- a/lib/bundler/rubygems_ext.rb
+++ b/lib/bundler/rubygems_ext.rb
@@ -36,13 +36,16 @@ module Gem
     def load_paths
       return full_require_paths if respond_to?(:full_require_paths)
 
-      require_paths.map do |require_path|
+      paths = require_paths.map do |require_path|
         if require_path.include?(full_gem_path)
           require_path
         else
           File.join(full_gem_path, require_path)
         end
       end
+
+      paths << File.join(ext_dir, require_paths.first) if self.respond_to?(:ext_dir) && !extensions.empty?
+      paths
     end
 
     if method_defined?(:extension_dir)