diff --git a/rowers/views/analysisviews.py b/rowers/views/analysisviews.py
index bc6e5e60..717cc709 100644
--- a/rowers/views/analysisviews.py
+++ b/rowers/views/analysisviews.py
@@ -319,7 +319,10 @@ def trendflexdata(workouts, options,userid=0):
 
     today = datetime.date.today()
 
-    datadf['days ago'] = list(map(lambda x : x.days, datadf.date - today))
+    try:
+        datadf['days ago'] = list(map(lambda x : x.days, datadf.date - today))
+    except TypeError:
+        datadf['days ago'] = 0
 
 
     if groupby != 'date':