diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index 2f8304b..bf7f84e 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -119,7 +119,11 @@ void InternalShot(Creature* c,
     }
     for (auto& tuple : weapon_meta->bullet_born_offset) {
         a8::Vec2 bullet_born_offset = a8::Vec2(std::get<0>(tuple), std::get<1>(tuple));
-        bullet_born_offset.Rotate(c->GetAttackDir().CalcAngle(a8::Vec2::UP));
+        float bullet_born_angle = c->GetAttackDir().CalcAngleEx(a8::Vec2::UP);
+        if (c->GetAttackDir().x > 0.00001f) {
+            bullet_born_angle = -bullet_born_angle;
+        }
+        bullet_born_offset.Rotate(bullet_born_angle);
         a8::Vec2 bullet_born_pos = c->GetPos() + bullet_born_offset;
         if (c->room->OverBorder(bullet_born_pos, 0.0f)) {
             return;
@@ -138,7 +142,11 @@ void InternalShot(Creature* c,
     }
     for (auto& tuple : weapon_meta->bullet_born_offset) {
         a8::Vec2 bullet_born_offset = a8::Vec2(std::get<0>(tuple), std::get<1>(tuple));
-        bullet_born_offset.Rotate(c->GetAttackDir().CalcAngle(a8::Vec2::UP));
+        float bullet_born_angle = c->GetAttackDir().CalcAngleEx(a8::Vec2::UP);
+        if (c->GetAttackDir().x > 0.00001f) {
+            bullet_born_angle = -bullet_born_angle;
+        }
+        bullet_born_offset.Rotate(bullet_born_angle);
         a8::Vec2 bullet_born_pos = c->GetPos() + c->shoot_offset + bullet_born_offset;
         a8::Vec2 bullet_dir = c->GetAttackDir();
         float bullet_angle = std::get<2>(tuple);