diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index adecbfe..cc35e24 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -1396,6 +1396,7 @@ RoomObstacle* Creature::SummonObstacle(int id, const a8::Vec2& pos)
         obstacle->SetTeamId(room, team_id);
         obstacle->SetMasterId(room, GetEntityUniId());
         obstacle->Active();
+        slave_things_.push_back(obstacle);
     } else {
         abort();
     }
@@ -1547,6 +1548,7 @@ void Creature::SummonHero(const a8::Vec2& pos,
                          dir,
                          team_id
                          );
+                    slave_heros_.push_back(hero);
                     break;
                 }
             }
@@ -1568,3 +1570,13 @@ void Creature::SlaveOnRemove(Entity* slave)
 {
 
 }
+
+void Creature::RemoveMoreHero(int buff_id, int id, int num)
+{
+
+}
+
+void Creature::RemoveMoreObstacle(int buff_id, int id, int num)
+{
+
+}
diff --git a/server/gameserver/creature.h b/server/gameserver/creature.h
index 2acb29e..1b5e8d7 100644
--- a/server/gameserver/creature.h
+++ b/server/gameserver/creature.h
@@ -164,6 +164,8 @@ private:
 
     Skill* GetPassiveSkill(int skill_id);
     void RemovePassiveSkill(int skill_id);
+    void RemoveMoreHero(int buff_id, int id, int num);
+    void RemoveMoreObstacle(int buff_id, int id, int num);
 
 protected:
     RaceType_e race_ = kHumanRace;