diff --git a/src/liblwevent/400_signalfd.h b/src/liblwevent/400_signalfd.h
index b80c3d5..81e0d06 100644
--- a/src/liblwevent/400_signalfd.h
+++ b/src/liblwevent/400_signalfd.h
@@ -24,6 +24,7 @@ signal delivery mechanism: certain signals can be read from a file descriptor qu
 
 
 /*! \brief Signal info structure.
+\ingroup compat
 
 This is the structure that is returned from a \c read(2) of a signalfd.
 
@@ -54,6 +55,7 @@ struct signalfd_siginfo {
 
 
 /*! \brief System call wrapper for \c signalfd(2).
+\ingroup compat
 
 \param fd File descriptor to modify (pass -1 to create a new file descriptor).
 \param mask Signal mask. Any signals set in \a mask will be delivered through \a fd (but see below).