diff --git a/src/Controller/TagifyEntityAutocompleteController.php b/src/Controller/TagifyEntityAutocompleteController.php
index defb12c83b18dc3a1a22e3fc6cd765e4a9f37a17..59ecbd46413b5164d2a63d9f08a7d2673387d182 100644
--- a/src/Controller/TagifyEntityAutocompleteController.php
+++ b/src/Controller/TagifyEntityAutocompleteController.php
@@ -85,7 +85,7 @@ class TagifyEntityAutocompleteController extends ControllerBase {
       // stored in the key/value store.
       $selection_settings = $this->keyValue('entity_autocomplete')->get($selection_settings_key, FALSE);
       // Validate the autocomplete minimum length.
-      if ($input === '' && $selection_settings['suggestions_dropdown']) {
+      if ($input === '' && isset($selection_settings['suggestions_dropdown']) && $selection_settings['suggestions_dropdown']) {
         return new JsonResponse([]);
       }