diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 976426f..8884b57 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -539,6 +539,12 @@ void Obstacle::OnExplosionHit(Explosion* e)
     if (meta->i->explosion_hit() == kExplosionHitEatDmg) {
         return;
     }
+    if (IsDead(e->GetRoom())) {
+        return;
+    }
+    if (e->GetDmg() < 0.001f) {
+        return;
+    }
     float dmg = e->GetDmg();
     float def = 0;
     float finaly_dmg = dmg * (1 - def/MetaMgr::Instance()->K);