diff --git a/Engine/src/states/Game.ts b/Engine/src/states/Game.ts
index b8b99bc..b6452de 100644
--- a/Engine/src/states/Game.ts
+++ b/Engine/src/states/Game.ts
@@ -110,7 +110,7 @@ export function GameState(ctx: ContextI): StateI {
     if (!w) return ctx.pop()
 
     // Add our world border.
-    let borderShape = planck.Chain([planck.Vec2(0, 0), planck.Vec2(w.width, 0), planck.Vec2(w.width, w.height), planck.Vec2(0, w.height), planck.Vec2(0, 0)])
+    let borderShape = planck.Chain([planck.Vec2(0, 0), planck.Vec2(w.width, 0), planck.Vec2(w.width, w.height), planck.Vec2(0, w.height), planck.Vec2(0, 0)], true)
     let borderFixture = worldBody.createFixture({
       shape: borderShape,
     })