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-rw-r--r--lib/rack/chunked.rb4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/rack/chunked.rb b/lib/rack/chunked.rb
index 0c8b4ae8..e7e7d8d1 100644
--- a/lib/rack/chunked.rb
+++ b/lib/rack/chunked.rb
@@ -62,7 +62,7 @@ module Rack
     # a version (nor response headers)
     def chunkable_version?(ver)
       case ver
-      when "HTTP/1.0", nil, "HTTP/0.9"
+      when 'HTTP/1.0', nil, 'HTTP/0.9'
         false
       else
         true
@@ -73,7 +73,7 @@ module Rack
       status, headers, body = @app.call(env)
       headers = HeaderHash.new(headers)
 
-      if ! chunkable_version?(env[HTTP_VERSION]) ||
+      if ! chunkable_version?(env[SERVER_PROTOCOL]) ||
          STATUS_WITH_NO_ENTITY_BODY.key?(status.to_i) ||
          headers[CONTENT_LENGTH] ||
          headers[TRANSFER_ENCODING]