diff --git a/microdata.go b/microdata.go
index 1bafbf8..7ac1237 100644
--- a/microdata.go
+++ b/microdata.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"code.google.com/p/go-html-transform/h5"
 	"io"
+	"net/url"
 	"strings"
 )
 
@@ -48,7 +49,7 @@ type Parser struct {
 	identifiedNodes map[string]*h5.Node
 }
 
-func NewParser(r io.Reader) *Parser {
+func NewParser(r io.Reader, url.URL) *Parser {
 	return &Parser{
 		p:    h5.NewParser(r),
 		data: NewMicrodata(),
diff --git a/microdata_test.go b/microdata_test.go
index 67fb8aa..42b34a3 100644
--- a/microdata_test.go
+++ b/microdata_test.go
@@ -6,7 +6,7 @@ import (
 )
 
 func ParseData(html string, t *testing.T) *Microdata {
-	p := NewParser(strings.NewReader(html))
+	p := NewParser(strings.NewReader(html), url.URL("http://example.com/")
 
 	data, err := p.Parse()
 	if err != nil {