diff --git a/config/schema/views_infinite_scroll.schema.yml b/config/schema/views_infinite_scroll.schema.yml
index 75df35b..69b1004 100644
--- a/config/schema/views_infinite_scroll.schema.yml
+++ b/config/schema/views_infinite_scroll.schema.yml
@@ -11,3 +11,6 @@ views.pager.infinite_scroll:
         automatically_load_content:
           type: boolean
           label: 'Automatically Load Content'
+        initial:
+          type: integer
+          label: 'Initial items'
diff --git a/src/Plugin/views/pager/InfiniteScroll.php b/src/Plugin/views/pager/InfiniteScroll.php
index 3af17a3..ca1b408 100644
--- a/src/Plugin/views/pager/InfiniteScroll.php
+++ b/src/Plugin/views/pager/InfiniteScroll.php
@@ -1,6 +1,5 @@
 <?php
 
-
 namespace Drupal\views_infinite_scroll\Plugin\views\pager;
 
 use Drupal\views\Plugin\views\pager\SqlBase;
@@ -93,7 +92,6 @@ class InfiniteScroll extends SqlBase {
         '#description' => $this->t('Automatically load subsequent pages as the user scrolls.'),
         '#default_value' => $options['automatically_load_content'],
       ],
-      // Initial items count.
       'initial' => [
         '#type' => 'textfield',
         '#title' => $this->t('Initial items'),
@@ -114,7 +112,7 @@ class InfiniteScroll extends SqlBase {
    * @param array $complete_form
    *   The complete form structure.
    */
-  public static function validateIntegerPositive(&$element, FormStateInterface $form_state, &$complete_form) {
+  public static function validateIntegerPositive(array &$element, FormStateInterface $form_state, array &$complete_form) {
     $value = $element['#value'];
     if ($value !== '' && (!is_numeric($value) || intval($value) != $value || $value < 0)) {
       $form_state->setError($element, t('%name must be a positive integer.', array('%name' => $element['#title'])));