diff --git a/lib/sprockets/sass_cache_store.rb b/lib/sprockets/sass_cache_store.rb
index <HASH>..<HASH> 100644
--- a/lib/sprockets/sass_cache_store.rb
+++ b/lib/sprockets/sass_cache_store.rb
@@ -9,11 +9,11 @@ module Sprockets
     end
 
     def _store(key, version, sha, contents)
-      environment.cache_set(key, {:version => version, :sha => sha, :contents => contents})
+      environment.cache_set("sass/#{key}", {:version => version, :sha => sha, :contents => contents})
     end
 
     def _retrieve(key, version, sha)
-      if obj = environment.cache_get(key)
+      if obj = environment.cache_get("sass/#{key}")
         return unless obj[:version] == version
         return unless obj[:sha] == sha
         obj[:obj]
Prepend sass/ to key