diff --git a/server/gameserver/buff/machine_gun.cc b/server/gameserver/buff/machine_gun.cc
index 15f4df9b..e2170431 100644
--- a/server/gameserver/buff/machine_gun.cc
+++ b/server/gameserver/buff/machine_gun.cc
@@ -89,7 +89,6 @@ void MachineGunBuff::ProcSkill()
 void MachineGunBuff::FgSkill()
 {
     bool shot_ok = false;
-    a8::Vec2 target_dir;
     float fly_distance = 0;
     int trace_target_uniid = 0;
     owner->Shot(owner->context_dir, shot_ok, fly_distance, trace_target_uniid);