diff --git a/sys/modules/i2c/controllers/alpm/Makefile b/sys/modules/i2c/controllers/alpm/Makefile
index 5429b9cee4db..885b983a8998 100644
--- a/sys/modules/i2c/controllers/alpm/Makefile
+++ b/sys/modules/i2c/controllers/alpm/Makefile
@@ -1,9 +1,8 @@
 # $FreeBSD$
 
 .PATH:		${.CURDIR}/../../../../pci
 KMOD		= alpm
-CFLAGS		+= -DALPM_SMBIO_BASE_ADDR=0xbc00
 SRCS		= device_if.h bus_if.h iicbus_if.h smbus_if.h pci_if.h \
 		  alpm.c
 
 .include <bsd.kmod.mk>
diff --git a/sys/modules/i2c/controllers/viapm/Makefile b/sys/modules/i2c/controllers/viapm/Makefile
index 03c073893998..37100301b84a 100644
--- a/sys/modules/i2c/controllers/viapm/Makefile
+++ b/sys/modules/i2c/controllers/viapm/Makefile
@@ -1,9 +1,8 @@
 # $FreeBSD$
 
 .PATH:		${.CURDIR}/../../../../pci
 KMOD		= viapm
 SRCS		= device_if.h bus_if.h iicbb_if.h isa_if.h pci_if.h smbus_if.h \
 		  opt_isa.h viapm.c
-CFLAGS		+= -DVIAPM_BASE_ADDR=0x6000
 
 .include <bsd.kmod.mk>