diff --git a/sys/conf/files.pc98 b/sys/conf/files.pc98
index 706d4f59d1f7..4b5f4611ac84 100644
--- a/sys/conf/files.pc98
+++ b/sys/conf/files.pc98
@@ -239,9 +239,6 @@ i386/isa/random_machdep.c	standard
 i386/isa/rc.c			optional	rc
 i386/isa/rp.c			optional	rp
 i386/isa/scd.c			optional	scd
-i386/isa/si.c			optional	si
-i386/isa/si2_z280.c		optional	si
-i386/isa/si3_t225.c		optional	si
 pc98/pc98/sio.c			optional	sio
 i386/isa/sound/ad1848.c		optional	css
 i386/isa/sound/ad1848.c		optional	gus