diff --git a/language/types/relative-class-types.xml b/language/types/relative-class-types.xml
index c91323f18e9c..565bae8d685f 100644
--- a/language/types/relative-class-types.xml
+++ b/language/types/relative-class-types.xml
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!-- $Revision$ -->
 <sect1 xml:id="language.types.relative-class-types">
  <title>Relative class types</title>