diff --git a/arch/aarch64/bits/hwcap.h b/arch/aarch64/bits/hwcap.h
index 1727a387..6fa64e8c 100644
--- a/arch/aarch64/bits/hwcap.h
+++ b/arch/aarch64/bits/hwcap.h
@@ -21,3 +21,4 @@
 #define HWCAP_ASIMDDP		(1 << 20)
 #define HWCAP_SHA512		(1 << 21)
 #define HWCAP_SVE		(1 << 22)
+#define HWCAP_ASIMDFHM		(1 << 23)