diff --git a/cq_editor/widgets/object_tree.py b/cq_editor/widgets/object_tree.py
index 0884e9e6..de2ffb2b 100644
--- a/cq_editor/widgets/object_tree.py
+++ b/cq_editor/widgets/object_tree.py
@@ -293,7 +293,7 @@ def addObject(self,obj,name='',options=None):
                                      ais=ais,
                                      sig=self.sigObjectPropertiesChanged))
 
-        self.sigObjectsAdded.emit([ais], name)
+        self.sigObjectsAdded.emit([ais], [name])
 
     @pyqtSlot(list)
     @pyqtSlot()