diff --git a/books/RayTracingInOneWeekend.html b/books/RayTracingInOneWeekend.html
index 3344a422..437bb055 100644
--- a/books/RayTracingInOneWeekend.html
+++ b/books/RayTracingInOneWeekend.html
@@ -3651,7 +3651,7 @@
     auto material_left   = make_shared<dielectric>(1.50);
     auto material_bubble = make_shared<dielectric>(1.00 / 1.50);
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++
-    auto material_right  = make_shared<metal>(color(0.8, 0.6, 0.2), 0.0);
+    auto material_right  = make_shared<metal>(color(0.8, 0.6, 0.2), 1.0);
 
     world.add(make_shared<sphere>(point3( 0.0, -100.5, -1.0), 100.0, material_ground));
     world.add(make_shared<sphere>(point3( 0.0,    0.0, -1.2),   0.5, material_center));