diff --git a/devel/jam/Makefile b/devel/jam/Makefile
index 40efa0441e6f..2864a113a16a 100644
--- a/devel/jam/Makefile
+++ b/devel/jam/Makefile
@@ -1,26 +1,26 @@
 PORTNAME=	jam
-PORTVERSION=	2.6.1
+DISTVERSION=	2.6.1
 CATEGORIES=	devel
-MASTER_SITES=	https://swarm.workshop.perforce.com/projects/perforce_software-jam/download/main/
+MASTER_SITES=	https://swarm.workshop.perforce.com/projects/perforce_software-jam/download/main/guest/perforce_software/${PORTNAME}/
 
 MAINTAINER=	gahr@FreeBSD.org
 COMMENT=	Build utility like make(1)
 WWW=		https://www.perforce.com/jam/jam.html
 
 LICENSE=	JAM
 LICENSE_NAME=	jam license
 LICENSE_TEXT=	License is hereby granted to use this software and distribute it freely, as long as this copyright notice is retained and modifications are clearly marked.
 LICENSE_PERMS=	dist-mirror dist-sell pkg-mirror pkg-sell auto-accept
 
 USES=		zip
 
 OPTIONS_DEFINE=	DOCS
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/bin/${PORTNAME} ${STAGEDIR}${PREFIX}/bin
 
 do-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/*.html ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>