diff --git a/arch/sh/include/asm/setup.h b/arch/sh/include/asm/setup.h
index 63c9efc06348..8488f76b48b4 100644
--- a/arch/sh/include/asm/setup.h
+++ b/arch/sh/include/asm/setup.h
@@ -7,7 +7,7 @@
 /*
  * This is set up by the setup-routine at boot-time
  */
-extern unsigned char *boot_params_page;
+extern unsigned char boot_params_page[];
 #define PARAM boot_params_page
 
 #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))