diff --git a/analytics/analytics/analytic_types/__init__.py b/analytics/analytics/analytic_types/__init__.py
index 02159d8..d7c742c 100644
--- a/analytics/analytics/analytic_types/__init__.py
+++ b/analytics/analytics/analytic_types/__init__.py
@@ -12,3 +12,5 @@ like PatternDetectionCache, then it should not be here.
 from analytic_types.data_bucket import DataBucket
 
 AnalyticUnitId = str
+
+TimeSeries = pandas.core.indexes.datetimes.DatetimeIndex