diff --git a/share/mk/bsd.port.mk b/share/mk/bsd.port.mk
index 2392b8fd69ed..4d6f64019027 100644
--- a/share/mk/bsd.port.mk
+++ b/share/mk/bsd.port.mk
@@ -3,5 +3,8 @@
 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
+
 .include <bsd.own.mk>
 .include "${BSDPORTMK}"