diff --git a/share/mk/src.sys.mk b/share/mk/src.sys.mk
index 03aefc4f1e4d..2682dca0d7bf 100644
--- a/share/mk/src.sys.mk
+++ b/share/mk/src.sys.mk
@@ -9,5 +9,5 @@
 SRCCONF?=	/etc/src.conf
 .if (exists(${SRCCONF}) || ${SRCCONF} != "/etc/src.conf") && !target(_srcconf_included_)
 .include "${SRCCONF}"
-_srcconf_included_:
+_srcconf_included_:	.NOTMAIN
 .endif