diff --git a/src/cube.cpp b/src/cube.cpp
index 6e778e1..8bc6860 100644
--- a/src/cube.cpp
+++ b/src/cube.cpp
@@ -41,7 +41,7 @@ cube::cube() {
 			&indices[0], GL_STATIC_DRAW);
 
 	srand(static_cast<unsigned int>(time(0)));
-	for(size_t i = 0; i < vertices.size(); i += 3)
+	for(size_t i = 0; i < vertices.size(); ++i)
 	{
 		colors.push_back(static_cast<float>(rand()) /
 				static_cast<float>(RAND_MAX));