diff --git a/share/mk/Makefile b/share/mk/Makefile
index d8aea5c5547..eaa8e0f8286 100644
--- a/share/mk/Makefile
+++ b/share/mk/Makefile
@@ -1,6 +1,11 @@
 # $FreeBSD$
 #	@(#)Makefile	8.1 (Berkeley) 6/8/93
 
+# Only parse this if executing make in this directory, not in other places
+# in src that lack a Makefile, such as sys/dev/*.  Otherwise the MAKESYSPATH
+# will read this Makefile since it auto includes it into -I.
+.if ${.CURDIR} == ${.PARSEDIR}
+
 .include <src.opts.mk>
 
 FILES=	\
@@ -63,3 +68,4 @@ FILES+=	tap.test.mk
 .endif
 
 .include <bsd.prog.mk>
+.endif	# CURDIR == PARSEDIR