--- a/src/core/boolean.h	Thu May 29 19:09:56 2008 -0700
+++ b/src/core/boolean.h	Thu May 29 23:24:10 2008 -0700
@@ -26,6 +26,8 @@
 namespace ns3 {
 
 /**
+ * \ingroup attribute
+ *
  * \brief Hold a bool native type
  *
  * \anchor bool