diff --git a/include/asm-h8300/setup.h b/include/asm-h8300/setup.h
new file mode 100644
index 0000000..e2c600e
--- /dev/null
+++ b/include/asm-h8300/setup.h
@@ -0,0 +1,6 @@
+#ifndef __H8300_SETUP_H
+#define __H8300_SETUP_H
+
+#define COMMAND_LINE_SIZE	512
+
+#endif