diff --git a/zipline/finance/slippage.py b/zipline/finance/slippage.py
index 7b0f164c..e13380e5 100644
--- a/zipline/finance/slippage.py
+++ b/zipline/finance/slippage.py
@@ -103,7 +103,6 @@ class VolumeShareSlippage(object):
         total_order = 0
         simulated_amount = 0
         simulated_impact = 0.0
-        direction = 1.0
 
         for order in current_orders: