diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index c9551d8b..5b0c7dc7 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -641,7 +641,7 @@ void Bullet::Check(float distance)
                         sender.Get()->IncDisableAttackDirTimes();
                         sender.Get()->room->xtimer.AddDeadLineTimerAndAttach
                             (
-                             (distance / gun_meta->i->bullet_speed() / 2) * SERVER_FRAME_RATE,
+                             std::ceil((distance / gun_meta->i->bullet_speed() / 2) * SERVER_FRAME_RATE),
                              a8::XParams()
                              .SetSender(sender.Get()),
                              [] (const a8::XParams& param)