diff --git a/src/pkg/html/parse.go b/src/pkg/html/parse.go
index 530942aa8f..823f7aad29 100644
--- a/src/pkg/html/parse.go
+++ b/src/pkg/html/parse.go
@@ -594,6 +594,12 @@ func inBodyIM(p *parser) (insertionMode, bool) {
 			}
 			p.popUntil(buttonScopeStopTags, "p")
 			p.addElement("li", p.tok.Attr)
+		case "optgroup", "option":
+			if p.top().Data == "option" {
+				p.oe.pop()
+			}
+			p.reconstructActiveFormattingElements()
+			p.addElement(p.tok.Data, p.tok.Attr)
 		default:
 			// TODO.
 			p.addElement(p.tok.Data, p.tok.Attr)
diff --git a/src/pkg/html/parse_test.go b/src/pkg/html/parse_test.go
index b0ddd92476..5022a4f779 100644
--- a/src/pkg/html/parse_test.go
+++ b/src/pkg/html/parse_test.go
@@ -132,7 +132,7 @@ func TestParser(t *testing.T) {
 		rc := make(chan io.Reader)
 		go readDat(filename, rc)
 		// TODO(nigeltao): Process all test cases, not just a subset.
-		for i := 0; i < 34; i++ {
+		for i := 0; i < 49; i++ {
 			// Parse the #data section.
 			b, err := ioutil.ReadAll(<-rc)
 			if err != nil {