1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rack/etag.rb b/lib/rack/etag.rb
index 99a1a4c0..fefe671f 100644
--- a/lib/rack/etag.rb
+++ b/lib/rack/etag.rb
@@ -28,7 +28,7 @@ module Rack
          body = Rack::BodyProxy.new(new_body) do
            original_body.close if original_body.respond_to?(:close)
          end
-        headers['ETag'] = %("#{digest}") if digest
+        headers['ETag'] = %(W/"#{digest}") if digest
        end
  
        unless headers['Cache-Control']