diff --git a/contracts/access/TimelockController.sol b/contracts/access/TimelockController.sol
index f96f37152..e06066368 100644
--- a/contracts/access/TimelockController.sol
+++ b/contracts/access/TimelockController.sol
@@ -18,6 +18,8 @@ import "./AccessControl.sol";
  * is in charge of proposing (resp executing) operations. A common use case is
  * to position this {TimelockController} as the owner of a smart contract, with
  * a multisig or a DAO as the sole proposer.
+ *
+ * _Available since v3.3._
  */
 contract TimelockController is AccessControl {