diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index a40dff4b3..86e10696e 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2001-09-04  Richard Henderson  <rth@redhat.com>
+
+	* alpha.h (struct alpha_operand): Pack elements into bitfields.
+
 2001-08-31  Eric Christopher  <echristo@redhat.com>
 
 	* mips.h: Remove CPU_MIPS32_4K.
diff --git a/include/opcode/alpha.h b/include/opcode/alpha.h
index 6f31e9ae0..487b69605 100644
--- a/include/opcode/alpha.h
+++ b/include/opcode/alpha.h
@@ -81,16 +81,16 @@ extern const unsigned alpha_num_opcodes;
 struct alpha_operand
 {
   /* The number of bits in the operand.  */
-  int bits;
+  unsigned int bits : 5;
 
   /* How far the operand is left shifted in the instruction.  */
-  int shift;
+  unsigned int shift : 5;
 
   /* The default relocation type for this operand.  */
-  int default_reloc;
+  signed int default_reloc : 16;
 
   /* One bit syntax flags.  */
-  unsigned flags;
+  unsigned int flags : 16;
 
   /* Insertion function.  This is used by the assembler.  To insert an
      operand value into an instruction, check this field.