diff --git a/rowers/dataroutines.py b/rowers/dataroutines.py
index 24ddf0cc..92c83cb7 100644
--- a/rowers/dataroutines.py
+++ b/rowers/dataroutines.py
@@ -983,9 +983,14 @@ def strfdelta(tdelta):
         minutes, seconds = divmod(tdelta.seconds, 60)
         tenths = int(tdelta.microseconds / 1e5)
     except AttributeError:  # pragma: no cover
-        minutes, seconds = divmod(tdelta.view(np.int64), 60e9)
-        seconds, rest = divmod(seconds, 1e9)
-        tenths = int(rest / 1e8)
+        try:
+            minutes, seconds = divmod(tdelta.view(np.int64), 60e9)
+            seconds, rest = divmod(seconds, 1e9)
+            tenths = int(rest / 1e8)
+        except AttributeError:
+            minutes = 0
+            seconds = 0
+            tenths = 0
     res = "{minutes:0>2}:{seconds:0>2}.{tenths:0>1}".format(
         minutes=minutes,
         seconds=seconds,