diff --git a/sys/modules/if_sl/Makefile b/sys/modules/if_sl/Makefile
deleted file mode 100644
index 800a9847943..00000000000
--- a/sys/modules/if_sl/Makefile
+++ /dev/null
@@ -1,13 +0,0 @@
-# $FreeBSD$
-
-.PATH: ${.CURDIR}/../../net
-
-KMOD=	if_sl
-SRCS=	if_sl.c slcompress.c opt_inet.h opt_slip.h
-
-.if !defined(KERNBUILDDIR)
-opt_inet.h:
-	echo "#define INET 1" > ${.TARGET}
-.endif
-
-.include <bsd.kmod.mk>