diff --git a/watcher/decision_engine/strategy/strategies/workload_balance.py b/watcher/decision_engine/strategy/strategies/workload_balance.py
index 8107410ef..9f37d8fb2 100644
--- a/watcher/decision_engine/strategy/strategies/workload_balance.py
+++ b/watcher/decision_engine/strategy/strategies/workload_balance.py
@@ -46,6 +46,7 @@ hosts nodes.
   algorithm with `CONTINUOUS` audits.
 """
 
+from __future__ import division
 import datetime
 
 from oslo_config import cfg