diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index 9d65c78..9a0d0e8 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -61,6 +61,10 @@ void Bullet::OnHit(std::set<Entity*>& objects)
                     hum->HasBuffEffect(kBET_AdPlaying)) {
                     continue;
                 }
+                if (player->room->GetRoomMode() == kZombieMode &&
+                    player->GetRace() == hum->GetRace()) {
+                    continue;
+                }
                 if (!hum->dead && (IsBomb() || player->team_id != hum->team_id)) {
                     float dmg = GetAtk() * (1 + player->GetBuffAttrRate(kHAT_Atk)) +
                         player->GetBuffAttrAbs(kHAT_Atk);
diff --git a/server/gameserver/constant.h b/server/gameserver/constant.h
index 8e342e9..c7bb4bf 100755
--- a/server/gameserver/constant.h
+++ b/server/gameserver/constant.h
@@ -344,3 +344,7 @@ const int MAX_ROOM_IDX = 2018;
 const int VIEW_RANGE = 512;
 
 const int MAX_AI_LEVEL = 8;
+
+const int HUMAN_RACE_META_START_ID = 5001;
+const int ZOMBIE_RACE_META_START_ID = 6001;
+