diff --git a/lib/httparty/request.rb b/lib/httparty/request.rb
index 5f2774eb..33e280af 100644
--- a/lib/httparty/request.rb
+++ b/lib/httparty/request.rb
@@ -53,7 +53,7 @@ def request_uri(uri)
     end
 
     def uri
-      new_uri = path.relative? ? URI.parse("#{base_uri}#{path}") : path
+      new_uri = path.relative? ? URI.parse("#{base_uri}#{path}") : path.clone
 
       # avoid double query string on redirects [#12]
       unless redirect
diff --git a/spec/httparty/request_spec.rb b/spec/httparty/request_spec.rb
index 80078fea..02b0a8af 100644
--- a/spec/httparty/request_spec.rb
+++ b/spec/httparty/request_spec.rb
@@ -133,6 +133,12 @@
         URI.unescape(@request.uri.query).should == ""
       end
 
+      it "does not duplicate query string parameters when uri is called twice" do
+        @request.options[:query] = {:foo => :bar}
+        @request.uri
+        @request.uri.query.should == "foo=bar"
+      end
+
       context "when representing an array" do
         it "returns a Rails style query string" do
           @request.options[:query] = {:foo => %w(bar baz)}