diff --git a/libc/kernel/uapi/linux/auxvec.h b/libc/kernel/uapi/linux/auxvec.h
index c80c170..3ca56fc 100644
--- a/libc/kernel/uapi/linux/auxvec.h
+++ b/libc/kernel/uapi/linux/auxvec.h
@@ -41,6 +41,8 @@
 #define AT_BASE_PLATFORM 24
 #define AT_RANDOM 25
 #define AT_HWCAP2 26
+#define AT_RSEQ_FEATURE_SIZE 27
+#define AT_RSEQ_ALIGN 28
 #define AT_EXECFN 31
 #ifndef AT_MINSIGSTKSZ
 #define AT_MINSIGSTKSZ 51