diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index f04439c3e..53adca323 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,8 @@
+2003-03-17 D.Venkatasubramanian <dvenkat@noida.hcltech.com>
+
+	* h8300.h (O_SYS_CMDLINE): New pseudo opcode for command line
+	processing.
+
 2003-02-21  Noida D.Venkatasubramanian  <dvenkat@noida.hcltech.com>
 
 	* h8300.h (ldmac, stmac): Replace MACREG with MS32 and MD32.
diff --git a/include/opcode/h8300.h b/include/opcode/h8300.h
index 034c7bc9d..bdba34567 100644
--- a/include/opcode/h8300.h
+++ b/include/opcode/h8300.h
@@ -313,6 +313,8 @@ struct h8_opcode
 #define O_SYS_CLOSE 105
 #define O_SYS_STAT 106
 #define O_SYS_FSTAT 107
+/* Space reserved for future file I/O system calls.  */
+#define O_SYS_CMDLINE 120
 /* End of System Call specific Changes.  */
 #define SB 0
 #define SW 1