diff --git a/shapes3d.scad b/shapes3d.scad
index c172d9b2..57d26f8e 100644
--- a/shapes3d.scad
+++ b/shapes3d.scad
@@ -2475,7 +2475,7 @@ module zcyl(
 //     tube(ir=10,or=20,h=30, ochamfer1=-5,irounding1=-3, orounding2=6, ichamfer2=2);
 // Example: Tube with a square hole circumscribing its diameter
 //   tube(od=22, id=9, h=10, $fn=48, ifn=4, circum=true);
-//   half_of(v=[-1,1]) color("lightblue") cyl(d=9, h=12, $fn=32y);
+//   half_of(v=[-1,1]) color("lightblue") cyl(d=9, h=12, $fn=32);
 // Example: Round ended hexagonal tube using `rounding_fn` to get sufficient facets on the roundings
 //   tube(or=10, ir=7, h=10, $fn=6, rounding_fn=64, rounding=1.3, teardrop=true);