diff --git a/src/Exporter.php b/src/Exporter.php
index 388318f..00d8f5a 100644
--- a/src/Exporter.php
+++ b/src/Exporter.php
@@ -9,6 +9,7 @@
  */
 namespace SebastianBergmann\Exporter;
 
+use const COUNT_RECURSIVE;
 use function bin2hex;
 use function count;
 use function get_resource_type;