diff --git a/2d/rubegoldberg/engine.cfg b/2d/rubegoldberg/engine.cfg
index 1f746c13..6078dc09 100644
--- a/2d/rubegoldberg/engine.cfg
+++ b/2d/rubegoldberg/engine.cfg
@@ -7,4 +7,4 @@ icon="res://icon.png"
 [physics_2d]
 
 default_gravity=500
-default_density=0.01
+default_linear_damp=0.01