diff --git a/pomodoro_to_harvest.py b/pomodoro_to_harvest.py
index 3b753c9..7c358d0 100644
--- a/pomodoro_to_harvest.py
+++ b/pomodoro_to_harvest.py
@@ -108,7 +108,8 @@ timelog['date'] = timelog['date'] + pd.to_timedelta(timelog['tmp_daysdelta'], un
 timelog.tmp_timeshift = '(' + timelog.tmp_timeshift + ')'  
 # timelog['description'] = (np.where(timelog['tmp_daysdelta'] > 0.0, timelog['description'].str.replace(timelog['tmp_timeshift'], ""), timelog['description']))
 # timelog.description.replace(regex=r'(?i)' + timelog.tmp_timeshift, value="")
-timelog['description'] = timelog.apply(lambda x: x['description'].replace(x['tmp_timeshift']), axis=1)
+timelog['tmp_timeshift'] = timelog['tmp_timeshift'].fillna("")
+timelog['description'] = timelog.apply(lambda x: x['description'].replace(x['tmp_timeshift'], ''), axis=1)
 
 # If a multiplier has been provided (an asterisk and an integer at the end of a
 # task), then multiply the time by it and remove it from the description.