diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index a5d9d299..0d575328 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -577,7 +577,7 @@ def save_workout_database(f2,r,dosmooth=True,workouttype='rower',
 
     # check for duplicate start times and duration
     ws = Workout.objects.filter(startdatetime=workoutstartdatetime,
-                                duration=duration,
+                                distance=totaldist,
 				    user=r)
     if (len(ws) != 0):
 	message =  "Warning: This workout probably already exists in the database"