diff --git a/sys/modules/fdc/Makefile b/sys/modules/fdc/Makefile
index bbd7ae068bf..e95a44b0de6 100644
--- a/sys/modules/fdc/Makefile
+++ b/sys/modules/fdc/Makefile
@@ -1,6 +1,11 @@
 # $FreeBSD$
 
+.if ${MACHINE} == "pc98"
+.PATH:  ${.CURDIR}/../../pc98/pc98
+CFLAGS+= -DPC98
+.else
 .PATH:  ${.CURDIR}/../../isa
+.endif
 
 KMOD=	fdc
 SRCS=	fd.c \