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-rw-r--r--lib/rainbows/rev/deferred_response.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rainbows/rev/deferred_response.rb b/lib/rainbows/rev/deferred_response.rb
index cc4ea10..243637d 100644
--- a/lib/rainbows/rev/deferred_response.rb
+++ b/lib/rainbows/rev/deferred_response.rb
@@ -13,7 +13,7 @@ module Rainbows
       end
 
       def on_read(data)
-        @do_chunk and @client.write(sprintf("%x\r\n", data.size))
+        @do_chunk and @client.write("#{data.size.to_s(16)}\r\n")
         @client.write(data)
         @do_chunk and @client.write("\r\n")
       end