diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 91ad24d01b..a84402de1c 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2005-05-19  Anton Blanchard  <anton@samba.org>
+
+	* ppc.h (PPC_OPCODE_POWER5): Define.
+
 2005-05-10  Nick Clifton  <nickc@redhat.com>
 
 	* Update the address and phone number of the FSF organization in
diff --git a/include/opcode/ppc.h b/include/opcode/ppc.h
index ef097a0ece..851b8bbab8 100644
--- a/include/opcode/ppc.h
+++ b/include/opcode/ppc.h
@@ -134,6 +134,9 @@ extern const int powerpc_num_opcodes;
 /* Opcode is supported by machine check APU.  */
 #define PPC_OPCODE_RFMCI	  0x800000
 
+/* Opcode is only supported by Power5 architecture.  */
+#define PPC_OPCODE_POWER5	    0x1000000
+
 /* A macro to extract the major opcode from an instruction.  */
 #define PPC_OP(i) (((i) >> 26) & 0x3f)