diff --git a/elf/elf.h b/elf/elf.h
index 94ca23c1bb..c0803a610e 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -1224,6 +1224,9 @@ typedef struct
 #define AT_HWCAP2	26		/* More machine-dependent hints about
 					   processor capabilities.  */
 
+#define AT_RSEQ_FEATURE_SIZE	27	/* rseq supported feature size.  */
+#define AT_RSEQ_ALIGN	28		/* rseq allocation alignment.  */
+
 #define AT_EXECFN	31		/* Filename of executable.  */
 
 /* Pointer to the global system page used for system calls and other