diff --git a/Gemfile.lock b/Gemfile.lock
index b2c857cf..69b4f195 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    compass (0.11.beta.2.c521908)
+    compass (0.11.beta.2.fb61e54)
       chunky_png (~> 0.12.0)
       sass (>= 3.1.0.alpha.218)
 
diff --git a/lib/compass/sass_extensions/functions/sprites.rb b/lib/compass/sass_extensions/functions/sprites.rb
index a7d598c5..5b8c9492 100644
--- a/lib/compass/sass_extensions/functions/sprites.rb
+++ b/lib/compass/sass_extensions/functions/sprites.rb
@@ -108,22 +108,6 @@ module Compass::SassExtensions::Functions::Sprites
       end
       output_png
     end
-
-    def uniqueness_hash
-      @uniqueness_hash ||= begin
-        sum = Digest::MD5.new
-        sum << SPRITE_VERSION
-        sum << path
-        images.each do |image|
-          [:relative_file, :height, :width, :repeat, :spacing, :position, :digest].each do |attr|
-            sum << image[attr].to_s
-          end
-        end
-        sum.hexdigest[0...10]
-      end
-      @uniqueness_hash
-    end
-
   end
 
   # Creates a SpriteMap object. A sprite map, when used in a property is the same