Index: head/sys/modules/i2c/ads111x/Makefile
===================================================================
--- head/sys/modules/i2c/ads111x/Makefile	(revision 355737)
+++ head/sys/modules/i2c/ads111x/Makefile	(revision 355738)
@@ -1,15 +1,18 @@
 # $FreeBSD$
 
 .PATH:		${SRCTOP}/sys/dev/iicbus
 
 KMOD=	ads111x
 SRCS=	ads111x.c
 
 SRCS+=	\
 	bus_if.h \
 	device_if.h \
 	iicbus_if.h \
-	ofw_bus_if.h \
 	opt_platform.h \
+
+.if !empty(OPT_FDT)
+SRCS+=	ofw_bus_if.h
+.endif
 
 .include <bsd.kmod.mk>