diff --git a/arch/m68k/defs.h b/arch/m68k/defs.h
new file mode 100644
index 0000000..686c63d
--- /dev/null
+++ b/arch/m68k/defs.h
@@ -0,0 +1,31 @@
+#ifndef __ARCH_M68K_DEFS_H
+#define __ARCH_M68K_DEFS_H
+
+#define REG_SZ		(4)
+#define MCONTEXT_GREGS	(20)
+
+#define REG_D0		(0)
+#define REG_D1		(1)
+#define REG_D2		(2)
+#define REG_D3		(3)
+#define REG_D4		(4)
+#define REG_D5		(5)
+#define REG_D6		(6)
+#define REG_D7		(7)
+#define REG_A0		(8)
+#define REG_A1		(9)
+#define REG_A2		(10)
+#define REG_A3		(11)
+#define REG_A4		(12)
+#define REG_A5		(13)
+#define REG_A6		(14)
+#define REG_A7		(15)
+#define REG_SP		(15)
+#define REG_PC		(16)
+#define REG_PS		(17)
+
+#define PC_OFFSET	REG_OFFSET(REG_PC)
+
+#include "common-defs.h"
+
+#endif