diff --git a/.gitignore b/.gitignore
index 7c2bdf2..e188da3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 *.log
 /var/routesCache
 /var/listenerCache
+/.phpactor.json
diff --git a/src/Infrastructure/functions.php b/src/Infrastructure/functions.php
index 46b4dd7..ea2e694 100644
--- a/src/Infrastructure/functions.php
+++ b/src/Infrastructure/functions.php
@@ -8,6 +8,7 @@ use function array_values;
 /**
  * @template T
  * @param array<T> $input
+ * @param callable(mixed, mixed=):scalar $callable
  * @return array<int, T>
  */
 function arrayFilter(