diff --git a/src/Psalm/Internal/Cli/Psalm.php b/src/Psalm/Internal/Cli/Psalm.php
index 536ad8282..5ccc4fa1c 100644
--- a/src/Psalm/Internal/Cli/Psalm.php
+++ b/src/Psalm/Internal/Cli/Psalm.php
@@ -41,6 +41,7 @@ use function array_map;
 use function array_merge;
 use function array_slice;
 use function array_sum;
+use function array_unshift;
 use function array_values;
 use function chdir;
 use function count;