diff --git a/share/mk/bsd.own.mk b/share/mk/bsd.own.mk
index 790582f4ccc..bde0e3f3a56 100644
--- a/share/mk/bsd.own.mk
+++ b/share/mk/bsd.own.mk
@@ -104,10 +104,12 @@
 .if !target(__<bsd.own.mk>__)
 __<bsd.own.mk>__:
 
+.if !defined(_WITHOUT_SRCCONF)
 SRCCONF?=	/etc/src.conf
 .if exists(${SRCCONF})
 .include "${SRCCONF}"
 .endif
+.endif
 
 # Binaries
 BINOWN?=	root
@@ -170,6 +172,7 @@ STRIP?=		-s
 COMPRESS_CMD?=	gzip -cn
 COMPRESS_EXT?=	.gz
 
+.if !defined(_WITHOUT_SRCCONF)
 #
 # Define MK_* variables (which are either "yes" or "no") for users
 # to set via WITH_*/WITHOUT_* in /etc/src.conf and override in the
@@ -448,5 +451,6 @@ MK_${var}_SUPPORT:= no
 MK_${var}_SUPPORT:= yes
 .endif
 .endfor
+.endif # !_WITHOUT_SRCCONF
 
 .endif	# !target(__<bsd.own.mk>__)
diff --git a/share/mk/bsd.port.mk b/share/mk/bsd.port.mk
index 4d6f6401902..99374a5024b 100644
--- a/share/mk/bsd.port.mk
+++ b/share/mk/bsd.port.mk
@@ -3,8 +3,9 @@
 PORTSDIR?=	/usr/ports
 BSDPORTMK?=	${PORTSDIR}/Mk/bsd.port.mk
 
-# Needed to keep bsd.own.mk from reading in /etc/src.conf when building ports.
-SRCCONF=	/dev/null
+# Needed to keep bsd.own.mk from reading in /etc/src.conf
+# and setting MK_* variables when building ports.
+_WITHOUT_SRCCONF=
 
 .include <bsd.own.mk>
 .include "${BSDPORTMK}"