diff --git a/runtime/autoload/xml/xhtml10s.vim b/runtime/autoload/xml/xhtml10s.vim
index ca87790..ec8300e 100644
--- a/runtime/autoload/xml/xhtml10s.vim
+++ b/runtime/autoload/xml/xhtml10s.vim
@@ -342,7 +342,7 @@
 \ 'height' : ['Number', ''],
 \ 'href' : ['*URI', ''],
 \ 'hreflang' : ['LangCode', ''],
-\ 'id' : ['ID', 'Unique string'],
+\ 'id' : ['ID', ''],
 \ 'ismap' : ['Bool', ''],
 \ 'label' : ['*Text', ''],
 \ 'lang' : ['LangCode', ''],