diff --git a/man2/clone.2 b/man2/clone.2
index 14f21c3fd..23114ba5b 100644
--- a/man2/clone.2
+++ b/man2/clone.2
@@ -297,7 +297,8 @@ When creating a process with
 .BR clone3 (),
 the
 .I set_tid
-array can be used to select specific PIDs for the process in some
+array (available since Linux 5.5)
+can be used to select specific PIDs for the process in some
 or all of the PID namespaces where it is present.
 If the PID of the newly created process should be set only for the current
 PID namespace or in the newly created PID namespace (if