diff --git a/lib/compass/sprite_importer.rb b/lib/compass/sprite_importer.rb
index 94d3b11e..459c20e6 100644
--- a/lib/compass/sprite_importer.rb
+++ b/lib/compass/sprite_importer.rb
@@ -31,7 +31,7 @@ module Compass
     end
     
     def to_s
-      content_for_images
+      self.class.name
     end
     
     def hash