diff --git a/help/C/intro.page b/help/C/intro.page
index 8a7bdec..e6f279b 100644
--- a/help/C/intro.page
+++ b/help/C/intro.page
@@ -1,6 +1,6 @@
 <page xmlns="http://projectmallard.org/1.0/"
       type="topic"
-      id="introduction">
+      id="intro">
 <info>
   <link type="guide" xref="index"/>
   <desc><app>Zenity</app> enables you to create the various types of simple dialog.</desc>