diff --git a/lib/Drupal/views/Plugin/views/field/Math.php b/lib/Drupal/views/Plugin/views/field/Math.php
index 684b9b195e7532f9f7f88e3d6daf719ded901cee..7b58fe0718e84d337657cfcd99756581fef3c178 100644
--- a/lib/Drupal/views/Plugin/views/field/Math.php
+++ b/lib/Drupal/views/Plugin/views/field/Math.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\views\Plugin\views\field;
 
+use ctools_math_expr;
 use Drupal\Core\Annotation\Plugin;
 
 /**