diff --git a/3d_models/gears.scad b/3d_models/gears.scad
index 66de29d..8148db0 100644
--- a/3d_models/gears.scad
+++ b/3d_models/gears.scad
@@ -4,6 +4,9 @@
 // Thanks to Greg Frost for his great "Involute Gears" script.
 //
 // Licensed under the BSD license.
+
+$fn = 100;
+
 include <MCAD/involute_gears.scad>