diff --git a/Large-app-how-to.md b/Large-app-how-to.md
index 9958b01..f24e610 100644
--- a/Large-app-how-to.md
+++ b/Large-app-how-to.md
@@ -440,7 +440,7 @@ Here is the `/app/__init__.py` :
             full_path = os.path.dirname(filename)
             if not os.path.isdir(full_path):
                 print('mkdir -p {filename}'.format(filename=full_path))
-            print('head -c 24 /dev/urandom > {filename}'.format(filename=full_path))
+            print('head -c 24 /dev/urandom > {filename}'.format(filename=filename))
             sys.exit(1)
 
     if not app.config['DEBUG']: