diff --git a/lib/new_relic/control/frameworks/rails3.rb b/lib/new_relic/control/frameworks/rails3.rb
index e33b42a617..5a3758bb07 100644
--- a/lib/new_relic/control/frameworks/rails3.rb
+++ b/lib/new_relic/control/frameworks/rails3.rb
@@ -50,7 +50,7 @@ def append_environment_info
     local_env.append_gem_list do
       bundler_gem_list
     end
-    local_env.append_plugin_list { ::Rails.configuration.plugins }
+    local_env.append_plugin_list { ::Rails.configuration.plugins.to_a }
   end
 
 end