diff --git a/2d/platformer/engine.cfg b/2d/platformer/engine.cfg
index 50b6b862..5461cbdd 100644
--- a/2d/platformer/engine.cfg
+++ b/2d/platformer/engine.cfg
@@ -28,6 +28,7 @@ spawn=[key(F1), jbutton(0, 11)]
 [physics_2d]
 
 default_gravity=700
+thread_model=1
 
 [rasterizer]