diff --git a/src/Plugin/DsField/Date.php b/src/Plugin/DsField/Date.php
index 05b54650..8a4d2288 100644
--- a/src/Plugin/DsField/Date.php
+++ b/src/Plugin/DsField/Date.php
@@ -63,7 +63,7 @@ abstract class Date extends DsFieldBase {
    */
   public function build() {
     $field = $this->getFieldConfiguration();
-    $date_format = str_replace('ds_post_date_', '', $field['formatter']);
+    $date_format = str_replace('ds_post_date_', '', $field['formatter'] ?? '');
     $render_key = $this->getRenderKey();
 
     return [