diff --git a/mach/m68k4/ncg/.distr b/mach/m68k4/ncg/.distr
index cdf251bc..3a019911 100644
--- a/mach/m68k4/ncg/.distr
+++ b/mach/m68k4/ncg/.distr
@@ -4,5 +4,6 @@ mach.c
 mach.h
 table
 whichone.h
+instrmacs.h
 tables1.c
 tables1.h
diff --git a/mach/m68k4/ncg/whichone.h b/mach/m68k4/ncg/whichone.h
index a18eb8fc..35ac4acf 100644
--- a/mach/m68k4/ncg/whichone.h
+++ b/mach/m68k4/ncg/whichone.h
@@ -3,6 +3,6 @@
  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
-#ifndef TBL68000
-#define TBL68000
-#endif
+#define WORD_SIZE	4	/* should be 2 or 4 */
+#define TBL68000	1	/* should be TBL68000 or TBL68020 */
+/* define TBL68881	1	/* define to use floating point processor */