diff --git a/OldMdePkg/Include/Common/BootScript.h b/OldMdePkg/Include/Common/BootScript.h
index 7f7c22976d..e40b79da7a 100644
--- a/OldMdePkg/Include/Common/BootScript.h
+++ b/OldMdePkg/Include/Common/BootScript.h
@@ -35,9 +35,15 @@
 #define EFI_BOOT_SCRIPT_SMBUS_EXECUTE_OPCODE          0x06
 #define EFI_BOOT_SCRIPT_STALL_OPCODE                  0x07
 #define EFI_BOOT_SCRIPT_DISPATCH_OPCODE               0x08
-#define EFI_BOOT_SCRIPT_DISPATCH_2_OPCODE             0x09
-#define EFI_BOOT_SCRIPT_INFORMATION_OPCODE            0x0A
 
+//
+// Extensions to boot script definitions
+//
+#define EFI_BOOT_SCRIPT_MEM_POLL_OPCODE               0x09
+#define EFI_BOOT_SCRIPT_INFORMATION_OPCODE            0x0A
+#define EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE_OPCODE      0x0B
+#define EFI_BOOT_SCRIPT_PCI_CONFIG2_READ_WRITE_OPCODE 0x0C
+#define EFI_BOOT_SCRIPT_DISPATCH_2_OPCODE             0x0D
 #define EFI_BOOT_SCRIPT_TABLE_OPCODE                  0xAA
 #define EFI_BOOT_SCRIPT_TERMINATE_OPCODE              0xFF