diff --git a/sensospot_data/__init__.py b/sensospot_data/__init__.py
index 470158b..6a1332c 100644
--- a/sensospot_data/__init__.py
+++ b/sensospot_data/__init__.py
@@ -92,9 +92,7 @@ def _parse_recursive(source, outfile, quiet):
         _parse_one_folder(f, child_outfile, quiet) for f in non_hidden
     )
     try:
-        collected_data = pandas.concat(
-            collection, ignore_index=True
-        ).reset_index()
-        _output(collected_data, source_path, outfile)
+        collected = pandas.concat(collection, ignore_index=True)
+        _output(collected.reset_index(), source_path, outfile)
     except ValueError as e:
         print(str(e))