diff --git a/geomagio/TimeseriesFactory.py b/geomagio/TimeseriesFactory.py
index b97e99dc8ae122c25d18ce3cd0f592f6196bf62f..2a99522f54b273d682b434accf062b940eec6925 100644
--- a/geomagio/TimeseriesFactory.py
+++ b/geomagio/TimeseriesFactory.py
@@ -190,7 +190,7 @@ class TimeseriesFactory(object):
                     self.write_file(fh, url_data, channels)
                 except NotImplementedError:
                     raise NotImplementedError(
-                            '"get_timeseries" not implemented')
+                            '"put_timeseries" not implemented')
 
     def write_file(self, fh, timeseries, channels):
         """Write timeseries data to the given file object.