diff --git a/server/gameserver/roomobstacle.cc b/server/gameserver/roomobstacle.cc
index f938d16..cc27518 100644
--- a/server/gameserver/roomobstacle.cc
+++ b/server/gameserver/roomobstacle.cc
@@ -208,9 +208,10 @@ void RoomObstacle::SpecExplosion()
                 room->grid_service->TraverseAllLayerHumanList
                     (room->GetRoomIdx(),
                      *grid_list_,
-                     [this, &human_list] (Human* hum, bool& stop)
+                     [this, &human_list, &bomb_pos] (Human* hum, bool& stop)
                      {
-                         if (master.Get()->team_id != hum->team_id && TestCollision(room, hum)) {
+                         if (master.Get()->team_id != hum->team_id &&
+                             bomb_pos.Distance(hum->GetPos()) < meta->i->damage_dia()) {
                              human_list.insert(hum);
                          }
                      }