diff --git a/rowers/c2stuff.py b/rowers/c2stuff.py
index 33c2ef2c..92aed939 100644
--- a/rowers/c2stuff.py
+++ b/rowers/c2stuff.py
@@ -686,7 +686,7 @@ def createc2workoutdata(w):
         wendtime = w.startdatetime.astimezone(pytz.timezone(
             w.timezone))+datetime.timedelta(seconds=makeseconds(durationstr))
     except UnknownTimeZoneError:
-        wendtime = w.startdatetime+datetime.timedelta(seconds=makeseconds(durationstr))
+        wendtime = w.startdatetime.astimezone(pytz.utc)+datetime.timedelta(seconds=makeseconds(durationstr))
 
     data = {
         "type": mytypes.c2mapping[workouttype],