diff --git a/src/Symfony/Component/Debug/Debug.php b/src/Symfony/Component/Debug/Debug.php
index 63f0b68221..2e36805ca3 100644
--- a/src/Symfony/Component/Debug/Debug.php
+++ b/src/Symfony/Component/Debug/Debug.php
@@ -46,7 +46,8 @@ class Debug
         ErrorHandler::register($errorReportingLevel, $displayErrors);
         if ('cli' !== php_sapi_name()) {
             ExceptionHandler::register();
-        } elseif (!ini_get('log_errors') || ini_get('error_log') && $displayErrors) {
+        // CLI - display errors only if they're not already logged to STDERR
+        } elseif ($displayErrors && (!ini_get('log_errors') || ini_get('error_log'))) {
             ini_set('display_errors', 1);
         }