diff --git a/docs/quickstart.md b/docs/quickstart.md
index c18efc9..ffc91ee 100644
--- a/docs/quickstart.md
+++ b/docs/quickstart.md
@@ -51,7 +51,7 @@ with a {py:class}`mcstructure.Block` in a list.
 import numpy as np
 
 np.rot90(struct.structure)
-struct.structure 
+struct.structure = np.transpose(struct.structure)
 ```