diff --git a/language/oop.xml b/language/oop.xml
index 1ea2b7ef97..c4337eb36f 100644
--- a/language/oop.xml
+++ b/language/oop.xml
@@ -1,5 +1,5 @@
 <?xml encoding="iso-8859-1"?>
-<!-- $Revision: 1.26 $ -->
+<!-- $Revision: 1.27 $ -->
  <chapter id="language.oop">
   <title>Classes and Objects</title>
 
@@ -413,7 +413,7 @@ $b = new B;
    </para>
   </sect1>
 
- <sect1 id="keyword.paamayim_nekudotayim"><!-- :-) -->
+ <sect1 id="keyword.paamayim-nekudotayim"><!-- :-) -->
    <title><literal>::</literal></title>
 
    <caution>