diff --git a/server/gameserver/buff/callfunc.cc b/server/gameserver/buff/callfunc.cc
index bbc76887..32098727 100644
--- a/server/gameserver/buff/callfunc.cc
+++ b/server/gameserver/buff/callfunc.cc
@@ -1025,7 +1025,7 @@ void CallFuncBuff::RangeHoldBuff()
         ()
         {
             float range = meta->GetBuffParam2(this);
-            std::vector<Human*> hit_humans;
+            std::set<Creature*> hit_humans;
             owner->room->TraverseAliveHumanList
                 (
                  [this, range] (Human* hum)
@@ -1037,16 +1037,7 @@ void CallFuncBuff::RangeHoldBuff()
                  });
             std::vector<Human*> leave_humans;
             for (auto& pair : context->in_human_infos) {
-                bool found = false;
-                #if 0
-                for (int i = 0; i < size; ++i){
-                    if (hit_humans[i] == pair.second.c.Get()) {
-                        found = true;
-                        break;
-                    }
-                }
-                #endif
-                if (!found) {
+                if (hit_humans.find(pair.second.c.Get()) == hit_humans.end()) {
                     on_leave(pair.second.c.Get()->AsHuman());
                     leave_humans.push_back(pair.second.c.Get()->AsHuman());
                 }