diff --git a/man7/kernel_lockdown.7 b/man7/kernel_lockdown.7
index 52b4bcee3..04de4d1fe 100644
--- a/man7/kernel_lockdown.7
+++ b/man7/kernel_lockdown.7
@@ -102,3 +102,6 @@ including direct configuration of, access to and driving of hardware.
 IMA requires the addition of the "secure_boot" rules to the policy,
 whether or not they are specified on the command line,
 for both the built-in and custom policies in secure boot lockdown mode.
+.SH VERSIONS
+The Kernel Lockdown feature was added in Linux 5.4.
+.\" commit 000d388ed3bbed745f366ce71b2bb7c2ee70f449