diff --git a/libpthread_dbg/files/pthread_dbg.3 b/libpthread_dbg/files/pthread_dbg.3
index 0f33a06126..7ced250e4f 100644
--- a/libpthread_dbg/files/pthread_dbg.3
+++ b/libpthread_dbg/files/pthread_dbg.3
@@ -134,6 +134,10 @@ In
 the
 .Nm
 library was moved to the new 1:1 thread model.
+.Pp
+This library was detached from the base distribution in
+.Nx 8.0
+and moved to pkgsrc.
 .Sh AUTHORS
 .An -nosplit
 .An Nathan J. Williams Aq Mt nathanw@NetBSD.org