diff --git a/lib/compass/app_integration/rails/actionpack31/helpers.rb b/lib/compass/app_integration/rails/actionpack31/helpers.rb
index 819e4242..f37acdf8 100644
--- a/lib/compass/app_integration/rails/actionpack31/helpers.rb
+++ b/lib/compass/app_integration/rails/actionpack31/helpers.rb
@@ -9,10 +9,12 @@ module Compass::RailsImageFunctionPatch
   private
   
   def image_path_for_size(image_file)
-    if file = ::Rails.application.assets.find_asset(image_file)
+    begin
+      file = ::Rails.application.assets.find_asset(image_file)
       return file
+    rescue ::Sprockets::FileOutsidePaths
+      return super(image_file)
     end
-    super(image_file)
   end
 end