diff --git a/pomodoro_to_harvest.py b/pomodoro_to_harvest.py
index 1d10532..77af53e 100644
--- a/pomodoro_to_harvest.py
+++ b/pomodoro_to_harvest.py
@@ -57,4 +57,6 @@ timelog['description'] = timelog['description'].str.strip()
 
 # Condense duplicate entries by date, summing the minutes spent, and listing
 # the first started and last recorded times for each task.
-tl = timelog.groupby(["date", "project", "description"]).agg({"time": 'sum', "started": 'min', "recorded": 'max'}).reset_index()
+tl = timelog.groupby(["date", timelog.project.fillna(""), "description"]).agg({"time": 'sum', "started": 'min', "recorded": 'max'}).reset_index()
+
+tl.to_csv('harvest-ready.csv', index = False)