diff --git a/server/gameserver/weakptr.cc b/server/gameserver/weakptr.cc
index 6e23282d..1a5a6c17 100644
--- a/server/gameserver/weakptr.cc
+++ b/server/gameserver/weakptr.cc
@@ -197,7 +197,7 @@ RoomObstacleWeakPtr&& RoomObstacleWeakPtr::operator=(RoomObstacleWeakPtr&& x)
 RoomObstacleWeakPtr::~RoomObstacleWeakPtr()
 {
     Reset();
-    ++Perf::Instance()->o_wptr_num;
+    --Perf::Instance()->o_wptr_num;
 }
 
 void RoomObstacleWeakPtr::Reset()