diff --git a/lib/savon/operation.rb b/lib/savon/operation.rb
index 00e40d87..506e627a 100644
--- a/lib/savon/operation.rb
+++ b/lib/savon/operation.rb
@@ -109,10 +109,6 @@ def build_request(builder)
         request.headers["MIME-Version"] = "1.0"
       end
 
-      # TODO: could HTTPI do this automatically in case the header
-      #       was not specified manually? [dh, 2013-01-04]
-      request.headers["Content-Length"] = request.body.bytesize.to_s
-
       request
     end
 
diff --git a/spec/savon/operation_spec.rb b/spec/savon/operation_spec.rb
index e10a6d61..6f17bb5d 100644
--- a/spec/savon/operation_spec.rb
+++ b/spec/savon/operation_spec.rb
@@ -106,15 +106,6 @@ def new_operation(operation_name, wsdl, globals)
       operation.call
     end
 
-    it "sets the Content-Length header" do
-      # XXX: probably the worst spec ever written. refactor! [dh, 2013-01-05]
-      http_request = HTTPI::Request.new
-      http_request.headers.expects(:[]=).with("Content-Length", "723")
-      Savon::SOAPRequest.any_instance.expects(:build).returns(http_request)
-
-      new_operation(:verify_address, wsdl, globals).call
-    end
-
     it "passes the local :soap_action option to the request builder" do
       globals.endpoint @server.url(:inspect_request)
       soap_action = "http://v1.example.com/VerifyAddress"