diff --git a/src/Symfony/Component/Console/Input/ArgvInput.php b/src/Symfony/Component/Console/Input/ArgvInput.php
index 7f54323872..fb2b3584f9 100644
--- a/src/Symfony/Component/Console/Input/ArgvInput.php
+++ b/src/Symfony/Component/Console/Input/ArgvInput.php
@@ -49,7 +49,7 @@ class ArgvInput extends Input
      */
     public function __construct(array $argv = null, InputDefinition $definition = null)
     {
-        $argv = $argv ?? $_SERVER['argv'] ?? [];
+        $argv = null !== $argv ? $argv : (isset($_SERVER['argv']) ? $_SERVER['argv'] : []);
 
         // strip the application name
         array_shift($argv);