diff --git a/modules/backend/formwidgets/Repeater.php b/modules/backend/formwidgets/Repeater.php
index 35088a670..9d3fde0fe 100644
--- a/modules/backend/formwidgets/Repeater.php
+++ b/modules/backend/formwidgets/Repeater.php
@@ -109,8 +109,8 @@ class Repeater extends FormWidgetBase
         }
 
         $fieldName = $this->formField->getName(false);
-        $this->indexInputName = self::INDEX_PREFIX.$fieldName;
-        $this->groupInputName = self::GROUP_PREFIX.$fieldName;
+        $this->indexInputName = $this->alias.self::INDEX_PREFIX.$fieldName;
+        $this->groupInputName = $this->alias.self::GROUP_PREFIX.$fieldName;
 
         $this->processGroupMode();