diff --git a/src/Plugin/EntityBrowser/WidgetSelector/Tabs.php b/src/Plugin/EntityBrowser/WidgetSelector/Tabs.php
index 0128b29..0c032ad 100644
--- a/src/Plugin/EntityBrowser/WidgetSelector/Tabs.php
+++ b/src/Plugin/EntityBrowser/WidgetSelector/Tabs.php
@@ -23,7 +23,7 @@ class Tabs extends WidgetSelectorBase {
     $element = [];
     /** @var \Drupal\entity_browser\EntityBrowserInterface $browser */
     $browser = $form_state->getFormObject()->getEntityBrowser();
-    foreach ($this->widget_ids as $id => $label) {
+    foreach ($this->widgets_ids as $id => $label) {
       $name = 'tab_selector_' . $id;
       $element[$name] = [
         '#type' => 'button',
diff --git a/src/WidgetSelectorBase.php b/src/WidgetSelectorBase.php
index b71687d..484a833 100644
--- a/src/WidgetSelectorBase.php
+++ b/src/WidgetSelectorBase.php
@@ -40,7 +40,7 @@ abstract class WidgetSelectorBase extends PluginBase implements WidgetSelectorIn
   public function __construct($configuration, $plugin_id, $plugin_definition) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
     $this->setConfiguration($configuration);
-    $this->widget_ids = isset($this->configuration['widget_ids']) ? $this->configuration['widget_ids'] : [];
+    $this->widgets_ids = isset($this->configuration['widget_ids']) ? $this->configuration['widget_ids'] : [];
   }
 
   /**
