diff --git a/src/Composer/Command/BaseCommand.php b/src/Composer/Command/BaseCommand.php
index 7ab897d5d..89c399624 100644
--- a/src/Composer/Command/BaseCommand.php
+++ b/src/Composer/Command/BaseCommand.php
@@ -190,6 +190,8 @@ abstract class BaseCommand extends Command
      * @inheritdoc
      *
      * Backport suggested values definition from symfony/console 6.1+
+     *
+     * TODO drop when PHP 8.1 / symfony 6.1+ can be required
      */
     public function complete(CompletionInput $input, CompletionSuggestions $suggestions): void
     {
diff --git a/src/Composer/Console/Input/InputArgument.php b/src/Composer/Console/Input/InputArgument.php
index 697556b3b..b9ee541f6 100644
--- a/src/Composer/Console/Input/InputArgument.php
+++ b/src/Composer/Console/Input/InputArgument.php
@@ -25,6 +25,8 @@ use Symfony\Component\Console\Input\InputArgument as BaseInputArgument;
  * @author Jérôme Tamarelle <jerome@tamarelle.net>
  *
  * @internal
+ *
+ * TODO drop when PHP 8.1 / symfony 6.1+ can be required
  */
 class InputArgument extends BaseInputArgument
 {
diff --git a/src/Composer/Console/Input/InputOption.php b/src/Composer/Console/Input/InputOption.php
index 72807355b..70654c0d8 100644
--- a/src/Composer/Console/Input/InputOption.php
+++ b/src/Composer/Console/Input/InputOption.php
@@ -25,6 +25,8 @@ use Symfony\Component\Console\Input\InputOption as BaseInputOption;
  * @author Jérôme Tamarelle <jerome@tamarelle.net>
  *
  * @internal
+ *
+ * TODO drop when PHP 8.1 / symfony 6.1+ can be required
  */
 class InputOption extends BaseInputOption
 {