diff --git a/devel/jam/Makefile b/devel/jam/Makefile
index 54086e76aafe..e4927c3ac8bf 100644
--- a/devel/jam/Makefile
+++ b/devel/jam/Makefile
@@ -7,6 +7,7 @@
 
 PORTNAME=	jam
 PORTVERSION=	2.5
+PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	ftp://ftp.perforce.com/pub/jam/
 
@@ -18,6 +19,7 @@ ONLY_FOR_ARCHS=	alpha i386
 USE_ZIP=	yes
 USE_REINPLACE=	yes
 EXTRACT_BEFORE_ARGS=	-q -aa
+NO_WRKSUBDIR=	yes
 
 DOCSDIR=	${PREFIX}/share/doc/jam
 
diff --git a/devel/jam/distinfo b/devel/jam/distinfo
index de68d060a26a..333a8277fd1b 100644
--- a/devel/jam/distinfo
+++ b/devel/jam/distinfo
@@ -1,2 +1,2 @@
-MD5 (jam-2.5.zip) = 964973902b14c28f91f4f2e487f79d20
-SIZE (jam-2.5.zip) = 193624
+MD5 (jam-2.5.zip) = f92caadb62fe4cb0b152eff508c9d450
+SIZE(jam-2.5.zip) = 191864