diff --git a/3d_triangle.scad b/3d_triangle.scad
old mode 100755
new mode 100644
diff --git a/involute_gears.scad b/involute_gears.scad
index eaf9051..fd80efe 100644
--- a/involute_gears.scad
+++ b/involute_gears.scad
@@ -286,7 +286,7 @@ module involute_bevel_gear_tooth (
 							[side2_point2[0],side2_point2[1],0],
 							[side2_point1[0],side2_point1[1],0],
 							[0.1,0,0]],
-						triangles=[[0,1,2],[0,2,3],[0,3,4],[0,5,1],[1,5,2],[2,5,3],[3,5,4],[0,4,5]]);
+						triangles=[[0,2,1],[0,3,2],[0,4,3],[0,1,5],[1,2,5],[2,3,5],[3,4,5],[0,5,4]]);
 				}
 			}
 		}