diff --git a/server/gameserver/frameevent.cc b/server/gameserver/frameevent.cc
index 0b32793..da22c83 100644
--- a/server/gameserver/frameevent.cc
+++ b/server/gameserver/frameevent.cc
@@ -106,6 +106,11 @@ void FrameEvent::AddBullet(int bullet_uniid,
             (
              [bullet_idx, &sender] (Human* hum, bool& stop)
              {
+#ifdef DEBUG
+                 if (!hum->InPartObjects(sender.Get())) {
+                     abort();
+                 }
+#endif
                 hum->bullets_.push_back(bullet_idx);
              });
     }