diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 78c0c150..9001bebc 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1295,7 +1295,7 @@ def update_wps(r,types,mode='water',asynchron=True):
             r.median_wps_erg = wps_median
 
         r.save()
-    except  ValuError: # pragma: no cover
+    except  ValueError: # pragma: no cover
         pass