diff --git a/src/Plugin/Field/FieldFormatter/DateRangeFormatterRangeFormatter.php b/src/Plugin/Field/FieldFormatter/DateRangeFormatterRangeFormatter.php
index 92ec640..4e843f0 100644
--- a/src/Plugin/Field/FieldFormatter/DateRangeFormatterRangeFormatter.php
+++ b/src/Plugin/Field/FieldFormatter/DateRangeFormatterRangeFormatter.php
@@ -79,7 +79,7 @@ class DateRangeFormatterRangeFormatter extends DateTimeCustomFormatter {
         }
         if (!array_key_exists($delta, $elements)) {
           // No end date provided or end date equals start date use single formatting.
-          $single_format = $this->getSetting('single');
+          $single_format = $this->getSetting('one_day');
           $elements[$delta] = ['#markup' => \Drupal::service('date.formatter')->format($start_date, 'custom', $this->t($single_format))];
         }
       }