diff --git a/man2/wait.2 b/man2/wait.2
index 40f2182c0..830f8f749 100644
--- a/man2/wait.2
+++ b/man2/wait.2
@@ -359,7 +359,10 @@ was specified and no child(ren) specified by
 .I id
 has yet changed state;
 on error, \-1 is returned.
-
+.\" FIXME: As reported by Vegard Nossum, if infop is NULL, then waitid()
+.\" returns the PID of the child.  Either this is a bug, or it is intended
+.\" behavior that needs to be documented.  See my Jan 2009 LKML mail 
+.\" "waitid() return value strangeness when infop is NULL".
 Each of these calls sets
 .I errno
 to an appropriate value in the case of an error.