diff --git a/geomagio/DerivedTimeseriesFactory.py b/geomagio/DerivedTimeseriesFactory.py
index 648a33f95fec4553561c88dbd014ace2aada35aa..273b18dd25a8d8409c45e69cf0274c03bd003647 100644
--- a/geomagio/DerivedTimeseriesFactory.py
+++ b/geomagio/DerivedTimeseriesFactory.py
@@ -99,7 +99,7 @@ class DerivedTimeseriesFactory(TimeseriesFactory):
                 channels=missing_inputs,
                 type=data_type,
                 interval=interval,
-                add_empty_channels=False,
+                add_empty_channels=True,
             )
         output_timeseries = Stream()
         for channel in channels: