diff --git a/regular_shapes.scad b/regular_shapes.scad
index c3acbcb..2d8f77c 100644
--- a/regular_shapes.scad
+++ b/regular_shapes.scad
@@ -253,7 +253,7 @@ module egg(width, length){
     rotate_extrude()
         difference(){
             egg_outline(width, length);
-            translate([-length, 0, 0]) cube(2*length, center=true);
+            translate([-length, 0, 0]) square(2*length, center=true);
         }
 }