diff --git a/default.go b/default.go
index 63263c8..26cb016 100644
--- a/default.go
+++ b/default.go
@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	ContentTypeHtml = "text/html"
+	contentTypeHtml = "text/html"
 )
 
 func defaultLinkHandler(link string) (*LinkInfo, error) {
@@ -69,7 +69,7 @@ func defaultLinkHandler(link string) (*LinkInfo, error) {
 	}
 
 	switch contentType {
-	case ContentTypeHtml:
+	case contentTypeHtml:
 		err = retrieveHtmlLinkTitle(ret, link)
 	default:
 		ret.Title = fmt.Sprintf("%s (%s, %s)", path.Base(u.Path), contentType, ByteCountDecimal(contentLength))