Index: wflow-py/wflow/wflow_funcs.py
===================================================================
diff -u -r531317c453fb999265e9b1dabd69dfd6532bd4e1 -re14061eac25a80485dc43ebab91c0f5b07649a78
--- wflow-py/wflow/wflow_funcs.py	(.../wflow_funcs.py)	(revision 531317c453fb999265e9b1dabd69dfd6532bd4e1)
+++ wflow-py/wflow/wflow_funcs.py	(.../wflow_funcs.py)	(revision e14061eac25a80485dc43ebab91c0f5b07649a78)
@@ -120,7 +120,7 @@
     Pfrac = (1 - p -pt) * Precipitation
 
     # S cannot be larger than Cmax, no gravity drainage below that
-    DD = ifthenelse (CanopyStorage > Cmax , Cmax - CanopyStorage , 0.0)
+    DD = ifthenelse (CanopyStorage > Cmax , CanopyStorage - Cmax , 0.0)
     CanopyStorage = CanopyStorage - DD
 
     # Add the precipitation that falls on the canopy to the store