diff --git a/src/Printers/Console.php b/src/Printers/Console.php
index 6b52c3b..45f9147 100644
--- a/src/Printers/Console.php
+++ b/src/Printers/Console.php
@@ -105,8 +105,8 @@ protected function colorize(string $s, ?string $color): string
 	 */
 	protected function detectColorSupport(): bool
 	{
-		return (function_exists('posix_isatty') && posix_isatty(STDOUT))
+		return defined('STDOUT') && ((function_exists('posix_isatty') && posix_isatty(STDOUT))
 			|| (function_exists('stream_isatty') && stream_isatty(STDOUT))
-			|| (function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(STDOUT));
+			|| (function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(STDOUT)));
 	}
 }