diff --git a/worldeditadditions/lib/torus.lua b/worldeditadditions/lib/torus.lua
index b8ee98c..66d5c99 100644
--- a/worldeditadditions/lib/torus.lua
+++ b/worldeditadditions/lib/torus.lua
@@ -59,8 +59,8 @@ function worldeditadditions.torus(position, major_radius, minor_radius, target_n
 				-- (x, y, z) is the point
 				-- a is the major radius (centre to centre of circle)
 				-- b is the minor radius (radius of circle)
-				local comp_a = (x_sq+y_sq+z_sq - (major_radius_sq+minor_radius_sq))
-				local test_value = comp_a*comp_a - 4*major_radius*minor_radius*(minor_radius_sq-z_sq)
+				local comp_a = (sq.x+sq.y+sq.z - (major_radius_sq+minor_radius_sq))
+				local test_value = comp_a*comp_a - 4*major_radius*minor_radius*(minor_radius_sq-sq.z)
 				
 				-- If we're inside the torus, then fill it in
 				if test_value <= 1 then