diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 0c304a72f..c8ef8e9eb 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2007-05-02  Alan Modra  <amodra@bigpond.net.au>
+
+	* ppc.h (PPC_OPERAND_PLUS1): Update comment.
+
 2007-04-23  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* m68k.h (mcfisa_c): New.
diff --git a/include/opcode/ppc.h b/include/opcode/ppc.h
index 4df543043..6771856fd 100644
--- a/include/opcode/ppc.h
+++ b/include/opcode/ppc.h
@@ -294,7 +294,7 @@ extern const unsigned int num_powerpc_operands;
 /* This operand is for the DQ field in a DQ form instruction.  */
 #define PPC_OPERAND_DQ (0x8000)
 
-/* Valid range of operand is 1..n rather than 0..n-1.  */
+/* Valid range of operand is 0..n rather than 0..n-1.  */
 #define PPC_OPERAND_PLUS1 (0x10000)
 
 /* The POWER and PowerPC assemblers use a few macros.  We keep them