diff --git a/docs/user_guide/triangle.ipynb b/docs/user_guide/triangle.ipynb
index f2f100ec..b4a6ac1a 100644
--- a/docs/user_guide/triangle.ipynb
+++ b/docs/user_guide/triangle.ipynb
@@ -274,7 +274,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "cl.options.set_option('array_backend', 'cupy')\n",
+    "cl.options.set_option('ARRAY_BACKEND', 'cupy')\n",
     "cl.options.reset_option()"
    ]
   },
@@ -430,7 +430,7 @@
     }
    ],
    "source": [
-    "cl.options.set_option('auto_sparse', False)\n",
+    "cl.options.set_option('AUTO_SPARSE', False)\n",
     "prism = cl.load_sample('prism', array_backend='sparse')\n",
     "prism.array_backend"
    ]