diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index d15dc6af..e28a9c84 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -162,7 +162,9 @@ void Room::Update(int delta_time)
             pair.second->Update(50);
         }
         for (auto& pair : task_hash_) {
-            pair.second->Update(50);
+            if (!pair.second->IsDone()) {
+                pair.second->Update(50);
+            }
         }
         #ifdef DEBUG1
         end_tick = a8::XGetTickCount();
diff --git a/server/gameserver/virtualbullet.cc b/server/gameserver/virtualbullet.cc
index a30584e8..49806bd3 100644
--- a/server/gameserver/virtualbullet.cc
+++ b/server/gameserver/virtualbullet.cc
@@ -89,7 +89,7 @@ void VirtualBullet::Update(int delta_time)
 
 bool VirtualBullet::IsDone()
 {
-    return false;
+    return later_removed_;
 }
 
 void VirtualBullet::Check(float distance)
@@ -271,7 +271,7 @@ void VirtualBullet::OnHit(std::set<Entity*>& objects)
 
 void VirtualBullet::Init()
 {
-
+    room->grid_service->GetAllCellsByXy(room, GetPos().x, GetPos().y, grid_list_);
 }
 
 bool VirtualBullet::TestCollision(Room* room, Entity* b)