diff --git a/arch/aarch64/bits/hwcap.h b/arch/aarch64/bits/hwcap.h
index 8541e329..8c040014 100644
--- a/arch/aarch64/bits/hwcap.h
+++ b/arch/aarch64/bits/hwcap.h
@@ -26,3 +26,4 @@
 #define HWCAP_USCAT		(1 << 25)
 #define HWCAP_ILRCPC		(1 << 26)
 #define HWCAP_FLAGM		(1 << 27)
+#define HWCAP_SSBS		(1 << 28)