--- a/src/spectrum/model/spectrum-channel.h	Wed May 18 20:01:44 2011 -0400
+++ b/src/spectrum/model/spectrum-channel.h	Wed May 18 17:24:04 2011 -0700
@@ -37,6 +37,8 @@
 class PropagationDelayModel;
 
 /**
+ * \ingroup spectrum
+ *
  * Defines the interface for spectrum-aware channel implementations
  *
  */