--- Makefile.orig	2015-03-23 12:52:01.911512571 +0100
+++ Makefile	2015-03-23 13:44:54.793290464 +0100
@@ -9,6 +9,9 @@
 MAINTAINER=	emulation@FreeBSD.org
 COMMENT=	ASN.1 structure parser library
 
+USES+=	cpe
+CPE_VENDOR=	gnu
+
 USE_LINUX=	f10
 USE_LINUX_RPM=	yes