diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php b/core/modules/migrate_drupal/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php
index 74c3841..69f86b9 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/process/d6/FieldFormatterSettingsDefaults.php
@@ -132,7 +132,8 @@ protected function numberSettings($type, $format) {
       ],
     ];
 
-    return isset($map[$type][$format]) ? $map[$type][$format] : [];
+    $default = ['format_plural' => FALSE, 'format_plural_string' => '1' . LOCALE_PLURAL_DELIMITER . '@count'];
+    return isset($map[$type][$format]) ? $map[$type][$format] + $default : [];
   }
 
 }