diff --git a/Report/DefaultReportCreator.cs b/Report/DefaultReportCreator.cs
index 3d85233cf..7188780d5 100644
--- a/Report/DefaultReportCreator.cs
+++ b/Report/DefaultReportCreator.cs
@@ -1253,7 +1253,7 @@ namespace BeWo.Report
             string[][] lContent = helper.PrepareContentArrayForSupportConceptExport(oids.ToArray());
 
             DataTable table = new DataTable();
-            int columnNumber = 3;
+            int columnNumber = lHeaderCaption.Count();
             for (int i = 0; i < columnNumber; i++)
                 table.Columns.Add(lHeaderCaption[i], typeof(string));