diff --git a/sys/modules/sio/Makefile b/sys/modules/sio/Makefile
index a028e8191da9..9f249179fb8b 100644
--- a/sys/modules/sio/Makefile
+++ b/sys/modules/sio/Makefile
@@ -1,33 +1,31 @@
 # $FreeBSD$
 
 .if ${MACHINE} == "pc98"
 .PATH: ${.CURDIR}/../../pc98/pc98
 .endif
 .PATH: ${.CURDIR}/../../dev/sio
 
 KMOD=	sio
-SRCS=	sio.c sio_pccard.c sio_pci.c sio_puc.c
-SRCS+=	opt_sio.h opt_ddb.h opt_compat.h opt_comconsole.h \
-	bus_if.h card_if.h device_if.h isa_if.h pci_if.h
-
+SRCS=	bus_if.h card_if.h device_if.h isa_if.h pci_if.h \
+	opt_comconsole.h opt_compat.h opt_ddb.h opt_sio.h \
+	sio.c sio_pccard.c sio_pci.c sio_puc.c
 .if ${MACHINE} == "pc98"
 SRCS+=	sio_cbus.c
 .else
 SRCS+=	sio_isa.c
 .endif
 .if ${MACHINE} == "sparc64"
 ### untested
 SRCS+=	sio_ebus.c
 .endif
 
 opt_compat.h:
-	@echo '#define COMPAT_43 1' > opt_compat.h
-	@echo '#define COMPAT_FREEBSD4 1' >> opt_compat.h
+	echo "#define COMPAT_43 1" > ${.TARGET}
 
 .if ${MACHINE} == "pc98"
 opt_sio.h:
-	@echo '#define COM_MULTIPORT 1' > opt_sio.h
-	@echo '#define COM_ESP 1' >> opt_sio.h
+	echo "#define COM_MULTIPORT 1" > ${.TARGET}
+	echo "#define COM_ESP 1" >> ${.TARGET}
 .endif
 
 .include <bsd.kmod.mk>