diff --git a/strategy/tagfilter.py b/strategy/tagfilter.py
index f6d56d4a..e49d4794 100644
--- a/strategy/tagfilter.py
+++ b/strategy/tagfilter.py
@@ -14,7 +14,6 @@
 #
 
 import itertools
-import os
 
 from .linear import StrategyModule as LinearStrategyModule