diff --git a/modules/nigiri/src/nigiri.cc b/modules/nigiri/src/nigiri.cc
index 82849062d..8d6c09b2e 100644
--- a/modules/nigiri/src/nigiri.cc
+++ b/modules/nigiri/src/nigiri.cc
@@ -111,7 +111,7 @@ struct nigiri::impl {
   std::unique_ptr<railviz> railviz_;
   std::string initial_permalink_;
   std::vector<schedule_info> schedules_;
-  cista::hash_t hash_;
+  cista::hash_t hash_{0U};
 };
 
 nigiri::nigiri() : module("Next Generation Routing", "nigiri") {