1 files changed, 2 insertions, 2 deletions
diff --git a/src/client/views/nodes/ButtonBox.tsx b/src/client/views/nodes/ButtonBox.tsx
index 54848344b..db4bb7972 100644
--- a/src/client/views/nodes/ButtonBox.tsx
+++ b/src/client/views/nodes/ButtonBox.tsx
@@ -44,8 +44,8 @@ export class ButtonBox extends DocComponent<FieldViewProps, ButtonDocument>(Butt
     @undoBatch
     @action
     drop = (e: Event, de: DragManager.DropEvent) => {
-        if (de.data instanceof DragManager.DocumentDragData) {
-            Doc.GetProto(this.dataDoc).source = new List<Doc>(de.data.droppedDocuments);
+        if (de.data instanceof DragManager.DocumentDragData && e.target) {
+            Doc.GetProto(this.dataDoc)[(e.target as any).textContent] = new List<Doc>(de.data.droppedDocuments);
             e.stopPropagation();
         }
     }