1 files changed, 1 insertions, 1 deletions
diff --git a/src/new_fields/List.ts b/src/new_fields/List.ts
index 5852e2c30..ff10a3f73 100644
--- a/src/new_fields/List.ts
+++ b/src/new_fields/List.ts
@@ -218,7 +218,7 @@ class ListImpl<T extends Field> extends ObjectField {
     }
 
     [Copy]() {
-        let copiedData = this.__fields.map(f => f instanceof ObjectField ? f[Copy]() : f);
+        let copiedData = this[Self].__fields.map(f => f instanceof ObjectField ? f[Copy]() : f);
         let deepCopy = new ListImpl<T>(copiedData as any);
         return deepCopy;
     }