diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index 3f7d8a12..6c506129 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -808,9 +808,7 @@ void Bullet::ProcFlyHook(Entity* target)
 
     if (target->IsCreature(room)) {
         Creature* c = (Creature*)target;
-#if 0
         room->frame_event.AddPropChg(c->GetWeakPtrRef(), kPropBeHook, 0, sender.Get()->GetUniId());
-#endif
         c->AutoNavigation(born_pos, gun_meta->i->bullet_speed() * 2);
     } else {
         sender.Get()->AutoNavigation(GetPos(), gun_meta->i->bullet_speed() * 2);
diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index 6a796509..e42737d0 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -3647,6 +3647,17 @@ void Creature::AutoNavigation(a8::Vec2 target_pos, float speed)
              a8::Vec2 new_pos = context->src_pos + dir * move_distance;
              c->SetPos(new_pos);
 
+#ifdef DEBUG
+             a8::XPrintf("speed:%d src_pos:%f,%f new_pos:%f,%f move_distance:%f\n",
+                         {
+                          context->speed,
+                          context->src_pos.x,
+                          context->src_pos.y,
+                          new_pos.x,
+                          new_pos.y,
+                          move_distance
+                         });
+#endif
              bool ok = false;
              if (c->CheckCollision()) {
                  c->SetPos(old_pos);