diff --git a/src/policy_cache.hpp b/src/policy_cache.hpp
index b28bb929..50cb7f6b 100644
--- a/src/policy_cache.hpp
+++ b/src/policy_cache.hpp
@@ -28,8 +28,6 @@
 #include <cstdint>
 #include <string>
 
-using namespace boost::flyweights;
-
 
 class PolicyCache
 {