diff --git a/beamtime/nappCombineSpectra.m b/beamtime/nappCombineSpectra.m
index 7c117f7..280a5eb 100644
--- a/beamtime/nappCombineSpectra.m
+++ b/beamtime/nappCombineSpectra.m
@@ -250,7 +250,11 @@ else
     end
 
     % copy essential information
-    TmpFileList.name = [p.Results.DataTable(p.Results.tableSelection,:).name{1} '_combined.h5'];
+    if contains(p.Results.energyScale,'xRay')
+        TmpFileList.name = [p.Results.DataTable(p.Results.tableSelection,:).name{1} '_combined.h5'];
+    else
+        TmpFileList.name = [p.Results.DataTable(p.Results.tableSelection,:).name{1} '_combined.ibw'];  
+    end
     TmpFileList.folder = p.Results.DataTable(p.Results.tableSelection,:).folder(1);
     TmpFileList.creationDate = p.Results.DataTable(p.Results.tableSelection,:).creationDate(1,:);
     TmpFileList.analysisDir = p.Results.DataTable(p.Results.tableSelection,:).analysisDir(1);