diff --git a/extra/gpu/demos/bunny/sobel.f.glsl b/extra/gpu/demos/bunny/sobel.f.glsl
index 16d2e408f2..7d21baf2d0 100644
--- a/extra/gpu/demos/bunny/sobel.f.glsl
+++ b/extra/gpu/demos/bunny/sobel.f.glsl
@@ -37,7 +37,7 @@ border_factor(vec2 texcoord)
 void
 main()
 {
-    gl_FragColor = /*vec4(border_factor(texcoord));*/ mix(
+    gl_FragColor = mix(
         texture2D(color_texture, texcoord),
         line_color,
         border_factor(texcoord)