diff --git a/arch/sh/defs.h b/arch/sh/defs.h
index 733e3f2..0367560 100644
--- a/arch/sh/defs.h
+++ b/arch/sh/defs.h
@@ -7,6 +7,9 @@
 #define REG_PC			(16)
 #define REG_PR			(17)
 #define REG_SR			(18)
+#define REG_GBR			(19)
+#define REG_MACH		(20)
+#define REG_MACL		(21)
 
 #include "common-defs.h"