diff --git a/parallel/Makefile b/parallel/Makefile
index bc614e6ac444..a6eef2375c51 100644
--- a/parallel/Makefile
+++ b/parallel/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.21 2012/03/21 20:57:14 asau Exp $
+# $NetBSD: Makefile,v 1.22 2013/07/02 11:10:04 rodent Exp $
 #
 
 COMMENT=	Applications dealing with parallelism in computing
@@ -16,6 +16,7 @@ SUBDIR+=	p5-Parallel-Pvm
 SUBDIR+=	paexec
 SUBDIR+=	parallel
 SUBDIR+=	pvm3
+SUBDIR+=	py-billiard
 SUBDIR+=	sge
 SUBDIR+=	slurm
 SUBDIR+=	threadingbuildingblocks