diff --git a/src/Symfony/Component/Console/CHANGELOG.md b/src/Symfony/Component/Console/CHANGELOG.md
index 8466f901f786f..11fe1293f533d 100644
--- a/src/Symfony/Component/Console/CHANGELOG.md
+++ b/src/Symfony/Component/Console/CHANGELOG.md
@@ -10,6 +10,7 @@ CHANGELOG
  * removed `TableStyle::getHorizontalBorderChar()` method in favor of `TableStyle::getBorderChars()`
  * removed `TableStyle::setVerticalBorderChar()` method in favor of `TableStyle::setVerticalBorderChars()`
  * removed `TableStyle::getVerticalBorderChar()` method in favor of `TableStyle::getBorderChars()`
+ * removed support for returning `null` from `Command::execute()`, return `0` instead
  * `ProcessHelper::run()` accepts only `array|Symfony\Component\Process\Process` for its `command` argument
  * `Application::setDispatcher` accepts only `Symfony\Contracts\EventDispatcher\EventDispatcherInterface` 
     for its `dispatcher` argument
diff --git a/src/Symfony/Component/Console/Command/Command.php b/src/Symfony/Component/Console/Command/Command.php
index aeabcc71ee6a6..b7bf16cfba2f3 100644
--- a/src/Symfony/Component/Console/Command/Command.php
+++ b/src/Symfony/Component/Console/Command/Command.php
@@ -255,7 +255,7 @@ public function run(InputInterface $input, OutputInterface $output)
             $statusCode = $this->execute($input, $output);
 
             if (!\is_int($statusCode)) {
-                @trigger_error(sprintf('A non numeric or nullable $statusCode returned by Command::execute() is deprecated since Symfony 4.4, return an integer value instead.'), E_USER_DEPRECATED);
+                throw new \TypeError(sprintf('Return value of "%s::execute()" must be of the type int, %s returned.', \get_class($this), \gettype($statusCode)));
             }
         }