diff --git a/server/gameserver/building.cc b/server/gameserver/building.cc
index 00b7b16..150a5ff 100644
--- a/server/gameserver/building.cc
+++ b/server/gameserver/building.cc
@@ -73,12 +73,12 @@ ColliderComponent* Building::GetBoxBound()
     collider->active = true;
     collider->owner = this;
     collider->_min = Vector2D(
-                             pos.x - meta->i->tilewidth()/2.0,
-                             pos.y - meta->i->tileheight()/2.0
+                             -meta->i->tilewidth()/2.0,
+                             -meta->i->tileheight()/2.0
                              );
     collider->_max = Vector2D(
-                              pos.x + meta->i->tilewidth()/2.0,
-                              pos.y + meta->i->tileheight()/2.0
+                              meta->i->tilewidth()/2.0,
+                              meta->i->tileheight()/2.0
                               );
     return collider;
 }