diff --git a/src/Form/WebformResultsCustomForm.php b/src/Form/WebformResultsCustomForm.php
index 2ff60d53..676ee424 100644
--- a/src/Form/WebformResultsCustomForm.php
+++ b/src/Form/WebformResultsCustomForm.php
@@ -152,7 +152,7 @@ class WebformResultsCustomForm extends FormBase {
         '1000' => '1000',
         '0' => $this->t('All'),
       ],
-      '#default_value' => ($limit != NULL) ? $limit : 50,
+      '#default_value' => ($limit !== NULL) ? $limit : 50,
     ];
 
     // Default configuration.