diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 5e0cfe9508c..62d2745d948 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,8 @@
+2002-09-02  Alan Modra  <amodra@bigpond.net.au>
+
+	* arc-opc.c: Include bfd.h.
+	(arc_get_opcode_mach): Subtract off base bfd_mach value.
+
 2002-08-30  Alan Modra  <amodra@bigpond.net.au>
 
 	* v850-dis.c (disassemble): Remove bfd_mach_v850ea case.
diff --git a/opcodes/arc-opc.c b/opcodes/arc-opc.c
index b7afb86ac92..c2d9e1b7478 100644
--- a/opcodes/arc-opc.c
+++ b/opcodes/arc-opc.c
@@ -20,6 +20,7 @@
 #include "sysdep.h"
 #include <stdio.h>
 #include "ansidecl.h"
+#include "bfd.h"
 #include "opcode/arc.h"
 
 #define INSERT_FN(fn) \
@@ -513,7 +514,7 @@ arc_get_opcode_mach (bfd_mach, big_p)
     ARC_MACH_7,
     ARC_MACH_8
   };
-  return mach_type_map[bfd_mach] | (big_p ? ARC_MACH_BIG : 0);
+  return mach_type_map[bfd_mach - bfd_mach_arc_5] | (big_p ? ARC_MACH_BIG : 0);
 }
 
 /* Initialize any tables that need it.