diff --git a/lib/compass/configuration/adapters.rb b/lib/compass/configuration/adapters.rb
index 01929daf..98fb8be4 100644
--- a/lib/compass/configuration/adapters.rb
+++ b/lib/compass/configuration/adapters.rb
@@ -19,8 +19,8 @@ module Compass
         plugin_opts = {:template_location => locations}
         plugin_opts[:style] = output_style if output_style
         plugin_opts[:line_comments] = line_comments
-        plugin_opts[:cache] = cache
-        plugin_opts[:cache_location] = cache_path
+        plugin_opts[:cache] = cache unless cache.nil?
+        plugin_opts[:cache_location] = cache_path unless cache_path.nil?
         plugin_opts.merge!(sass_options || {})
         plugin_opts
       end