diff --git a/src/game/physics/map_simulation.cpp b/src/game/physics/map_simulation.cpp
index 8e756f2..08cdd84 100644
--- a/src/game/physics/map_simulation.cpp
+++ b/src/game/physics/map_simulation.cpp
@@ -49,11 +49,11 @@ void MapSimulation::constructSquareObstacle(float minX, float minY, float maxX,
 {
     b2BodyDef bodyDef;
     bodyDef.type = b2_staticBody;
-    bodyDef.position.Set((maxX - minX) / 2.f, (maxY - minY) / 2.f);
+    bodyDef.position.Set((maxX + minX) / 2.f, (maxY + minY) / 2.f);
     b2Body *body = world->CreateBody(&bodyDef);
 
     b2PolygonShape shape;
-    shape.SetAsBox(maxX - minX, maxY - minY);
+    shape.SetAsBox((maxX - minX) / 2.f, (maxY - minY) / 2.f);
 
     b2FixtureDef fixtureDef;
     fixtureDef.shape = &shape;