diff --git a/util/ack/Makefile b/util/ack/Makefile
index 4a40deea..1fd9d65a 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=$(EMHOME)/lib/descr
 FE=fe
 INTABLES=pdp int
-LNTABLES=acc apc abc ocm vax4 i86 m68k2 m68k4 pmds pmds4 mantra mantra4 \
+LNTABLES=acc apc abc ocm vax4 i86 m68k2 m68k4 pmds pmds4 mantra \
 	m68020 z8000 int22 int24 int44 6500 6800 6805 6809 i80 ns s2650 z80 \
 	sun3
 INCLUDES=-I$(EMHOME)/h