diff --git a/libc/include/sys/reboot.h b/libc/include/sys/reboot.h
index df81139da..7d202f736 100644
--- a/libc/include/sys/reboot.h
+++ b/libc/include/sys/reboot.h
@@ -42,7 +42,6 @@ __BEGIN_DECLS
 #define RB_POWER_OFF    LINUX_REBOOT_CMD_POWER_OFF
 
 extern int reboot(int  reboot_type);
-extern int __reboot(int, int, int, void *);
 
 __END_DECLS