diff --git a/README.md b/README.md
index 47954f5..31c9e46 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ import numpy as np
 # Define an array of triangles
 # Following the STL standard, each triangle is defined with : normal, v0, v1, v2
 quad = np.array([
-    # normal,          v0,              v1,              v2
+    # normal,          vertices 0,      vertices 1,      vertices 2
     [[0.0, 0.0, 1.0], [0.0, 0.0, 0.0], [1.0, 0.0, 0.0], [1.0, 1.0, 0.0]], # Triangle 1
     [[0.0, 0.0, 1.0], [0.0, 0.0, 0.0], [0.0, 1.0, 0.0], [1.0, 1.0, 0.0]], # Triangle 2
 ])