diff --git a/BigBrainWorkshop2023.ipynb b/BigBrainWorkshop2023.ipynb
index 0af620c..fc0f0fd 100644
--- a/BigBrainWorkshop2023.ipynb
+++ b/BigBrainWorkshop2023.ipynb
@@ -224,7 +224,7 @@
    "outputs": [],
    "source": [
     "matched_sections = siibra.features.get(\n",
-    "    voi, siibra.features.cellular.CellbodyStainedSection\n",
+    "    points, siibra.features.cellular.CellbodyStainedSection\n",
     ")\n",
     "assert len(matched_sections) > 0 "
    ]