diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 4cab2758..ede5ec73 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1017,8 +1017,8 @@ def new_workout_from_df(r,df,
 
     df.rename(columns = columndict,inplace=True)
 
-    #starttimeunix = mktime(startdatetime.utctimetuple())
-    starttimeunix = arrow.get(startdatetime).timestamp
+    starttimeunix = mktime(startdatetime.utctimetuple())
+    #starttimeunix = arrow.get(startdatetime).timestamp
     df[' ElapsedTime (sec)'] = df['TimeStamp (sec)']
 
     df['TimeStamp (sec)'] = df['TimeStamp (sec)']+starttimeunix