diff --git a/hatmill.go b/hatmill.go
index 4901513..65ead7a 100644
--- a/hatmill.go
+++ b/hatmill.go
@@ -5,7 +5,7 @@ import "io"
 import "os"
 import "strings"
 
-// Html is either Element or Text
+// Html is one of EmptyElement, ParentElement, Text, or RText.
 type Html interface {
 	io.WriterTo