diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 25c472a1..24746f04 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1044,7 +1044,12 @@ def save_workout_database(f2, r, dosmooth=True, workouttype='rower',
     ishard = False
     if workouttype == 'water':
         df = getsmallrowdata_db(['power', 'workoutid', 'time'], ids=[w.id])
-        if df['power'].mean():
+        try:
+            powermean = df['power'].mean()
+        except KeyError:
+            powermean = 0
+            
+        if powermean != 0:
             thesecs = totaltime
             maxt = 1.05 * thesecs
             if maxt > 0: