diff --git a/demos/cube.geo b/demos/cube.geo
index edd17731ae7d47b3d16a6c9592b566568a754b63..e6505482355ddc1db51144cf1402228943f53e6a 100644
--- a/demos/cube.geo
+++ b/demos/cube.geo
@@ -12,6 +12,3 @@ Plane Surface(6) = {5};
 Extrude {0,0.0,1} {
   Surface{6};
 }
-
-// try netgen:
-// Mesh.Algorithm3D = 4;