diff --git a/src/defs.txt b/src/defs.txt
index 78deece..7e21cf8 100644
--- a/src/defs.txt
+++ b/src/defs.txt
@@ -60,21 +60,18 @@ actor 3000 0 0 moonlet
 actor 1000 20 300 monolith
     scale 2
     mass 1000
-    collider mesh
     rotationx 0.5
     angularmomentum 0.0 0.0 0.01
 
 actor 10000 2000 -3500 monolith
     scale 2
     mass 1000
-    collider mesh
     rotationx 0.5
     angularmomentum 0.0 0.0 0.01
 
 actor -8000 -1000 -100 monolith
     scale 2
     mass 1000
-    collider mesh
     rotationx 0.5
     angularmomentum 0.0 0.0 0.01