diff --git a/lib/restclient/payload.rb b/lib/restclient/payload.rb
index 43b779a..916e71c 100644
--- a/lib/restclient/payload.rb
+++ b/lib/restclient/payload.rb
@@ -61,7 +61,7 @@ module RestClient
             result += flatten_params(value, calculated_key)
           elsif value.is_a? Array
             value.each do |elem|
-              result << [calculated_key, elem]
+              result << ["#{calculated_key}[]", elem]
             end
           else
             result << [calculated_key, value]
diff --git a/spec/payload_spec.rb b/spec/payload_spec.rb
index 85abaf6..4500858 100644
--- a/spec/payload_spec.rb
+++ b/spec/payload_spec.rb
@@ -33,11 +33,11 @@ describe RestClient::Payload do
               should == "foo[bar]=baz"
     end
 
-    it "should properyl handle arrays as repeated parameters" do
+    it "should properly handle arrays as repeated parameters" do
       RestClient::Payload::UrlEncoded.new({:foo => ['bar']}).to_s.
-              should == "foo=bar"
+              should == "foo[]=bar"
       RestClient::Payload::UrlEncoded.new({:foo => ['bar', 'baz']}).to_s.
-              should == "foo=bar&foo=baz"
+              should == "foo[]=bar&foo[]=baz"
     end
 
   end