Index: wflow/wflow_funcs.py
===================================================================
diff -u -rea1abea30e5bb78599ed87563a3299ded24f6d20 -rfb94d37a19d0f05f001762c59125765ebea5188b
--- wflow/wflow_funcs.py	(.../wflow_funcs.py)	(revision ea1abea30e5bb78599ed87563a3299ded24f6d20)
+++ wflow/wflow_funcs.py	(.../wflow_funcs.py)	(revision fb94d37a19d0f05f001762c59125765ebea5188b)
@@ -904,7 +904,7 @@
         wantrel = pcr.max(0.0, storage - (maxstorage * target_perc_full))
         # Assume extra maximum Q if spilling
         overflowQ = pcr.max((storage - maxstorage), 0.0)
-        torelease = pcr.min(wantrel, overflowQ + maximum_Q * timestepsecs / fl_nr_loop)
+        torelease = pcr.min(wantrel, overflowQ + maximum_Q * timestepsecs / fl_nr_loop - demandRelease)
         storage = storage - torelease
         outflow = torelease + demandRelease
         percfull = storage / maxstorage