diff --git a/rowers/tasks.py b/rowers/tasks.py
index c2d88579..004142ef 100644
--- a/rowers/tasks.py
+++ b/rowers/tasks.py
@@ -2645,8 +2645,8 @@ def handle_makeplot(f1, f2, t, hrdata, plotnr, imagename,
     if (plotnr in [1, 2, 4, 5, 8, 11, 9, 12]) and (nr_rows > 1200):  # pragma: no cover
         bin = int(nr_rows / 1200.)
         try:
-            df = df.select_types(['number'])
-            df = row.df.groupby(lambda x: x / bin).mean()
+            df = row.df.select_types(['number'])
+            df = df.groupby(lambda x: x / bin).mean()
             row.df = df
         except:
             pass