diff --git a/libc/include/sys/linux-syscalls.h b/libc/include/sys/linux-syscalls.h
index 7b74a4b..e33e916 100644
--- a/libc/include/sys/linux-syscalls.h
+++ b/libc/include/sys/linux-syscalls.h
@@ -132,6 +132,7 @@
 #define __NR_delete_module                (__NR_SYSCALL_BASE + 129)
 #define __NR_syslog                       (__NR_SYSCALL_BASE + 103)
 #define __NR_sysinfo                      (__NR_SYSCALL_BASE + 116)
+#define __NR_personality                  (__NR_SYSCALL_BASE + 136)
 #define __NR_futex                        (__NR_SYSCALL_BASE + 240)
 #define __NR_poll                         (__NR_SYSCALL_BASE + 168)