diff --git a/tools/replay/replay.cc b/tools/replay/replay.cc
index d8d59e41a..d6d02b1a9 100644
--- a/tools/replay/replay.cc
+++ b/tools/replay/replay.cc
@@ -193,7 +193,7 @@ void Replay::startStream(const std::shared_ptr<Segment> segment) {
     auto event = reader.getRoot<cereal::Event>();
     uint64_t wall_time = event.getInitData().getWallTimeNanos();
     if (wall_time > 0) {
-      route_date_time_ = wall_time / 1e6;
+      route_date_time_ = wall_time / 1e9;
     }
   }
 
diff --git a/tools/replay/replay.h b/tools/replay/replay.h
index 3e2bc7c00..ce6d75bd6 100644
--- a/tools/replay/replay.h
+++ b/tools/replay/replay.h
@@ -100,7 +100,7 @@ private:
   std::atomic<bool> exit_ = false;
   std::atomic<bool> interrupt_requested_ = false;
   bool events_ready_ = false;
-  std::time_t route_date_time_;
+  std::time_t route_date_time_ = 0;
   uint64_t route_start_ts_ = 0;
   std::atomic<uint64_t> cur_mono_time_ = 0;
   cereal::Event::Which cur_which_ = cereal::Event::Which::INIT_DATA;