diff --git a/src/policy_cache.hpp b/src/policy_cache.hpp
index 4601f3f0..f2c96121 100644
--- a/src/policy_cache.hpp
+++ b/src/policy_cache.hpp
@@ -76,6 +76,7 @@ public:
     uint64_t hash;
     const char *rv;
 
+    rv = NULL;
     hash = wyhash(key_.c_str(),key_.size(),0xdeadbeef,_wyp);
     _cache.cvisit(hash,
                   [&](Map::value_type const &v_)