diff --git a/src/Psalm/Internal/Cli/Psalm.php b/src/Psalm/Internal/Cli/Psalm.php
index 5ccc4fa1cb8..ee14bec18aa 100644
--- a/src/Psalm/Internal/Cli/Psalm.php
+++ b/src/Psalm/Internal/Cli/Psalm.php
@@ -186,7 +186,7 @@ public static function run(array $argv): void
 
         // debug CI environment
         if (!in_array('--debug', $options, true) && 'true' === getenv('GITHUB_ACTIONS') && '1' === getenv('RUNNER_DEBUG')) {
-            array_unshift('--debug', $options);
+            array_unshift($options, '--debug');
         }
 
         self::forwardCliCall($options, $argv);