diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
index 51ccfab408cc..ea819ae024dd 100644
--- a/Documentation/arm64/elf_hwcaps.txt
+++ b/Documentation/arm64/elf_hwcaps.txt
@@ -178,3 +178,7 @@ HWCAP_ILRCPC
 HWCAP_FLAGM
 
     Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0001.
+
+HWCAP_SSBS
+
+    Functionality implied by ID_AA64PFR1_EL1.SSBS == 0b0010.