diff --git a/docs/source/examples/Variable Inspector.ipynb b/docs/source/examples/Variable Inspector.ipynb
index 3350e3d3e1..6dba4d55d4 100644
--- a/docs/source/examples/Variable Inspector.ipynb	
+++ b/docs/source/examples/Variable Inspector.ipynb	
@@ -73,7 +73,7 @@
     "            self.closed = True\n",
     "            VariableInspectorWindow.instance = None\n",
     "\n",
-    "    def _fill(self):\n",
+    "    def _fill(self, _result):\n",
     "        \"\"\"Fill self with variable information.\"\"\"\n",
     "        values = self.namespace.who_ls()\n",
     "        self._table.value = '<div class=\"rendered_html jp-RenderedHTMLCommon\"><table><thead><tr><th>Name</th><th>Type</th><th>Value</th></tr></thead><tr><td>' + \\\n",