diff --git a/src/vertex_color.fp.glsl b/src/vertex_color.fp.glsl
index 5bc7156..76aa9d5 100644
--- a/src/vertex_color.fp.glsl
+++ b/src/vertex_color.fp.glsl
@@ -1,8 +1,8 @@
 #version 120
 
-varying vec3 color_out;
+//varying vec3 color_out;
 
 void main()
 {
-  gl_FragColor = vec4(color_out, 1);
+  gl_FragColor = gl_Color;
 }
diff --git a/src/vertex_color.vp.glsl b/src/vertex_color.vp.glsl
index 8c102fd..ec465e4 100644
--- a/src/vertex_color.vp.glsl
+++ b/src/vertex_color.vp.glsl
@@ -5,10 +5,10 @@ uniform float time;
 attribute vec3 position;
 attribute vec3 color;
 
-varying vec3 color_out;
+//varying vec3 color_out;
 
 void main()
 {
   gl_Position = vec4(position, 1);
-  color_out = color;
+  gl_FrontColor = vec4(color, 1);
 }