diff --git a/function.php b/function.php
index e15fbe36..db05489a 100644
--- a/function.php
+++ b/function.php
@@ -82,6 +82,7 @@ if (!function_exists('recursive_directory')) {
 				call_user_func($callback, $directoryIterator);
 			}
 		}
+		unset($directoryIterators);
 	}