diff --git a/server/gameserver/stats.cc b/server/gameserver/stats.cc
index 47f0fd63..f4624d61 100644
--- a/server/gameserver/stats.cc
+++ b/server/gameserver/stats.cc
@@ -218,6 +218,9 @@ void PlayerStats::Statement(Human* sender)
         sender->GetNetData()->CalcBattleStat(this);
     }
     game_time = f8::App::Instance()->GetNowTime();
+    if (sender->GetBattleStartTime() <= 0) {
+        abort();
+    }
     game_duration = game_time - sender->GetBattleStartTime();
     statemented = 1;
 }