diff --git a/share/mk/bsd.README b/share/mk/bsd.README
index 907440e6ec96..30cb59f5684c 100644
--- a/share/mk/bsd.README
+++ b/share/mk/bsd.README
@@ -1,4 +1,4 @@
-#	$NetBSD: bsd.README,v 1.322 2013/11/11 10:24:53 joerg Exp $
+#	$NetBSD: bsd.README,v 1.323 2013/12/06 23:14:15 matt Exp $
 #	@(#)bsd.README	8.2 (Berkeley) 4/2/94
 
 This is the README file for the make "include" files for the NetBSD
@@ -880,6 +880,10 @@ TOOL_VGRIND		Grind nice listings of programs.  [vgrind -f]
 
 TOOL_ZIC		Time zone compiler.  [zic]
 
+For each possible value of MACHINE_CPU, MACHINES.${MACHINE_CPU} contain a
+list of what ports can be built for it.  This keeps those definitions in
+centralized place.
+
 <bsd.own.mk> is generally useful when building your own Makefiles so that
 they use the same default owners etc. as the rest of the tree.
 
diff --git a/share/mk/bsd.own.mk b/share/mk/bsd.own.mk
index 74fa67d816cf..7ae52bbd2912 100644
--- a/share/mk/bsd.own.mk
+++ b/share/mk/bsd.own.mk
@@ -1,4 +1,4 @@
-#	$NetBSD: bsd.own.mk,v 1.756 2013/12/05 22:51:08 matt Exp $
+#	$NetBSD: bsd.own.mk,v 1.757 2013/12/06 23:14:15 matt Exp $
 
 # This needs to be before bsd.init.mk
 .if defined(BSD_MK_COMPAT_FILE)
@@ -502,7 +502,7 @@ MACHINES.mips=		arc cobalt algor cobalt emips evbmips ews4800mips \
 MACHINES.powerpc=	amigappc bebox evbppc ibmnws macppc mvmeppc \
 			ofppc prep rs6000 sandpoint
 MACHINES.sh3=		dreamcast evbsh3 hpcsh landisk mmeye
-MACHINES.sparc=		sparc
+MACHINES.sparc=		sparc sparc64
 MACHINES.sparc64=	sparc64
 MACHINES.vax=		vax
 MACHINES.x86_64=	amd64