1 files changed, 6 insertions, 1 deletions

diff --git a/init/halt.c b/init/halt.c
index c88c333e7..16906dfe0 100644
--- a/init/halt.c
+++ b/init/halt.c
@@ -40,10 +40,15 @@ static void write_wtmp(void)
 #define RB_HALT_SYSTEM RB_HALT
 #endif
 
+#ifndef RB_POWERDOWN
+/* Stop system and switch power off if possible.  */
+# define RB_POWERDOWN   0x4321fedc
+#endif
 #ifndef RB_POWER_OFF
-#define RB_POWER_OFF RB_POWERDOWN
+# define RB_POWER_OFF RB_POWERDOWN
 #endif
 
+
 int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int halt_main(int argc UNUSED_PARAM, char **argv)
 {