diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 8ab1f704f..a027c8df7 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,8 @@
+2001-07-11  Frank Ch. Eigler  <fche@redhat.com>
+
+	* cgen.h (CGEN_MACH): Add insn_chunk_bitsize field.
+	(cgen_cpu_desc): Ditto.
+
 2001-07-07  Ben Elliston  <bje@redhat.com>
 
 	* m88k.h: Clean up and reformat. Remove unused code.
diff --git a/include/opcode/cgen.h b/include/opcode/cgen.h
index c13c4d9e8..c01b5c2a2 100644
--- a/include/opcode/cgen.h
+++ b/include/opcode/cgen.h
@@ -199,6 +199,8 @@ typedef struct {
   const char *bfd_name;
   /* one of enum mach_attr */
   int num;
+  /* parameter from mach->cpu */
+  unsigned int insn_chunk_bitsize;
 } CGEN_MACH;
 
 /* Parse result (also extraction result).
@@ -1166,6 +1168,10 @@ typedef struct cgen_cpu_desc
      lazily fetch the data from there.  */
   unsigned int word_bitsize;
 
+  /* Instruction chunk size (in bits), for purposes of endianness
+     conversion.  */
+  unsigned int insn_chunk_bitsize;
+
   /* Indicator if sizes are unknown.
      This is used by default_insn_bitsize,base_insn_bitsize if there is a
      difference between the selected isa's.  */