diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index 4faa2fb886163007f57af8ec54ad45769b2bf2d3..288abeb5476fcf112449ac3f8d203379972a06de 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -255,8 +255,10 @@ static inline void *set_exception_table_evt(unsigned int evt, void *handler)
  */
 #ifdef CONFIG_CPU_SH2A
 extern unsigned int instruction_size(unsigned int insn);
-#else
+#elif defined(CONFIG_SUPERH32)
 #define instruction_size(insn)	(2)
+#else
+#define instruction_size(insn)	(4)
 #endif
 
 /* XXX