diff --git a/DiffractionGratings/grating3D.geo b/DiffractionGratings/grating3D.geo
index 127c743f40b5a1a870fd39bed4829f6933554bea..850abe4a0e1861a25c70416a0cd61ab6c609d413 100644
--- a/DiffractionGratings/grating3D.geo
+++ b/DiffractionGratings/grating3D.geo
@@ -221,7 +221,7 @@ EndFor
 If (tag_geom==3) // Split torus weird otherwise
   Mesh.Algorithm = 6;
 EndIf
-Mesh.Optimimze3D=1;
+Mesh.Optimimze=1;
 // Mesh.SurfaceEdges = 0;
 Mesh.VolumeEdges = 0;
 Mesh.ElementOrder = og;