diff --git a/chassis/rplidar_dust_cover.scad b/chassis/rplidar_dust_cover.scad
index 38519fd..6cc818f 100644
--- a/chassis/rplidar_dust_cover.scad
+++ b/chassis/rplidar_dust_cover.scad
@@ -44,7 +44,7 @@
 //                 tabs audibly engage (2–3 mm deflection), test rotation lock.
 // =============================================================================
 
-$fn = 64;
+\$fn = 64;
 e  = 0.01;
 
 // =============================================================================