diff --git a/Action b/Action
index ba261d65e..0ffba38e9 100644
--- a/Action
+++ b/Action
@@ -86,6 +86,10 @@ name "Intel 80286 support for Xenix"
 dir mach/xenix3
 indir
 end
+name "Intel 80386 support for Xenix 386 System V"
+dir mach/i386
+indir
+end
 name "MSC6500 support"
 dir mach/6500
 indir
diff --git a/doc/install.doc b/doc/install.doc
index e4ace66cf..76d802951 100644
--- a/doc/install.doc
+++ b/doc/install.doc
@@ -415,6 +415,7 @@ vax_bsd4_2	VAX11 with BSD4.2	vax4
 vax_sysV_2	VAX11 with System V.2	vax4
 pc_ix	IBM PC with PC/IX	i86
 xenix3	IBM AT with Microsoft Xenix V3.2	xenix3
+i386	Intel 80386 system running Xenix System V	i386
 m68_unisoft	Motorola 68000 with Unisoft UNIX	m68k2
 m68_pmds	Philips PMDS	pmds
 m68_sysV_0	68000 with Uniplus UNIX System V.0	mantra
@@ -856,6 +857,12 @@ xenix3	Microsoft Xenix V3	2/2	C	+	xenix3	IBM AT with Xenix
 			Occam
 			Modula-2
 
+i386	SCO Xenix System V	4/4	C	+	i386	Intel 80386 system with Xenix System V
+			Pascal
+			Basic
+			Occam
+			Modula-2
+
 minix	Minix PC	2/2	C	+	minix	IBM PC running Minix
 			Pascal		i86
 			Basic
diff --git a/util/ack/Makefile b/util/ack/Makefile
index 434884768..b9dfad1fe 100644
--- a/util/ack/Makefile
+++ b/util/ack/Makefile
@@ -9,7 +9,7 @@ OBJ=list.o data.o main.o scan.o svars.o trans.o util.o rmach.o run.o \
 ACKDIR=$(EMHOME)/lib
 FE=fe
 INTABLES=pdp
-LNTABLES=acc apc abc ocm m2 vax4 i86 m68k2 m68k4 pmds pmds4 mantra \
+LNTABLES=acc apc abc ocm m2 vax4 i86 i386 m68k2 m68k4 pmds pmds4 mantra \
 	m68020 z8000 em22 em24 em44 6500 6800 6805 6809 i80 ns s2650 z80 \
 	sun3 sun2 xenix3 minix minixST
 INCLUDES=-I$(EMHOME)/h