diff --git a/src/Symfony/Component/Console/Input/ArrayInput.php b/src/Symfony/Component/Console/Input/ArrayInput.php
index 44c2f0d5c6..9f8f93a65e 100644
--- a/src/Symfony/Component/Console/Input/ArrayInput.php
+++ b/src/Symfony/Component/Console/Input/ArrayInput.php
@@ -132,7 +132,7 @@ class ArrayInput extends Input
             }
             if (0 === strpos($key, '--')) {
                 $this->addLongOption(substr($key, 2), $value);
-            } elseif ('-' === $key[0]) {
+            } elseif (0 === strpos($key, '-')) {
                 $this->addShortOption(substr($key, 1), $value);
             } else {
                 $this->addArgument($key, $value);