diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index 9a0d0e8..eba0b2f 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -83,7 +83,9 @@ void Bullet::OnHit(std::set<Entity*>& objects)
         case ET_Obstacle:
             {
                 Obstacle* obstacle = (Obstacle*)target;
-                if (!obstacle->IsDead(room) && obstacle->Attackable()) {
+                if (!obstacle->IsDead(room) &&
+                    obstacle->Attackable() &&
+                    !obstacle->IsTerminatorAirDropBox(room)) {
                     float dmg = GetAtk() * (1 + player->GetBuffAttrRate(kHAT_Atk)) +
                         player->GetBuffAttrAbs(kHAT_Atk);
                     float def = 0;
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index ec7abdb..a3cf880 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -526,15 +526,11 @@ bool Human::IsCollisionInMapService()
                 if (!collider->owner->dead && TestCollision((ColliderComponent*)collider)) {
 #endif
                     if (last_collision_door_ != collider->owner) {
-                        bool is_terminator_airdrop_box = false;
-                        if (obstacle->IsEntitySubType(EST_RoomObstacle)) {
-                            is_terminator_airdrop_box = ((RoomObstacle*)obstacle)->is_terminator_airdrop_box;
-                        }
                         if (!obstacle->IsDead(room) &&
                             obstacle->Attackable() &&
                             obstacle->meta->i->drop() != 0 &&
                             room->GetGasData().gas_mode != GasInactive &&
-                            (!is_terminator_airdrop_box || GetRace() == kHumanRace)
+                            (!obstacle->IsTerminatorAirDropBox(room) || GetRace() == kHumanRace)
                             ) {
                             obstacle->Die(room);
                             if (obstacle->IsDead(room)) {
@@ -547,7 +543,7 @@ bool Human::IsCollisionInMapService()
                                 DropItems(obstacle);
                             }
                             obstacle->BroadcastFullState(room);
-                            if (is_terminator_airdrop_box && GetRace() == kHumanRace) {
+                            if (obstacle->IsTerminatorAirDropBox(room) && GetRace() == kHumanRace) {
                                 MetaData::Buff* buff_meta = MetaMgr::Instance()->GetBuff(TERMINATOR_BUFF_ID);
                                 if (buff_meta) {
                                     AddBuff(this, buff_meta, 1);
diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 8e8b56a..54395f4 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -301,7 +301,9 @@ void Obstacle::Explosion(Bullet* bullet)
             case ET_Obstacle:
                 {
                     Obstacle* obstacle = (Obstacle*)target;
-                    if (!obstacle->IsDead(room) && obstacle->Attackable()) {
+                    if (!obstacle->IsDead(room) &&
+                        obstacle->Attackable() &&
+                        !obstacle->IsTerminatorAirDropBox(room)) {
                         float dmg = meta->i->damage();
                         float def = 0;
                         float finaly_dmg = dmg * (1 - def/MetaMgr::Instance()->K);
diff --git a/server/gameserver/obstacle.h b/server/gameserver/obstacle.h
index 51506e7..cb55fd7 100644
--- a/server/gameserver/obstacle.h
+++ b/server/gameserver/obstacle.h
@@ -36,6 +36,7 @@ class Obstacle : public Entity
     virtual bool IsDead(Room* room) override;
     virtual long long GetDeadFrameNo(Room* room) override;
     virtual void OnPreCollision(Room* room) override;
+    virtual bool IsTerminatorAirDropBox(Room* room) { return false; }
     void Explosion(Bullet* bullet);
     void SetDoorInfo(Building* building, int door_id_x);
     bool IsDoor();
diff --git a/server/gameserver/roomobstacle.h b/server/gameserver/roomobstacle.h
index 44360e6..e4df4d3 100644
--- a/server/gameserver/roomobstacle.h
+++ b/server/gameserver/roomobstacle.h
@@ -13,6 +13,7 @@ class RoomObstacle : public Obstacle
     virtual ~RoomObstacle() override;
     virtual void Initialize() override;
     virtual void RecalcSelfCollider() override;
+    virtual bool IsTerminatorAirDropBox(Room* room) override { return is_terminator_airdrop_box; }
 
 protected:
     RoomObstacle();