--- a/DataSetBuilder.st	Fri May 29 21:52:44 1998 +0200
+++ b/DataSetBuilder.st	Tue Jun 02 13:28:52 1998 +0200
@@ -2667,6 +2667,8 @@
     list    add:label beforeIndex:idx.  
     self selectedColumnModel value:idx.
     self updateColumnView.
+    modified := true.
+
 !
 
 doPaste