diff --git a/uppsrc/CtrlLib/ArrayCtrl.cpp b/uppsrc/CtrlLib/ArrayCtrl.cpp
index 1c3d14aad..2994ba9e6 100644
--- a/uppsrc/CtrlLib/ArrayCtrl.cpp
+++ b/uppsrc/CtrlLib/ArrayCtrl.cpp
@@ -2444,6 +2444,8 @@ void ArrayCtrl::Serialize(Stream& s)
 void ArrayCtrl::Reset() {
 	header.Reset();
 	idx.Clear();
+	id_ndx.Clear();
+	id_ndx.Add(Id());
 	column.Clear();
 	control.Clear();
 	nocursor = false;