diff --git a/book/robot/inspector.ipynb b/book/robot/inspector.ipynb
index 157e235b..b815e683 100644
--- a/book/robot/inspector.ipynb
+++ b/book/robot/inspector.ipynb
@@ -86,7 +86,7 @@
     "    elif description == \"Franka Emika Panda\":\n",
     "        return \"package://drake_models/franka_description/urdf/panda_arm_hand.urdf\"\n",
     "    elif description == \"UR3e\":\n",
-    "        return \"package://drake_models/ur_description/ur3e_cylinders_collision.urdf\"\n",
+    "        return \"package://drake_models/ur_description/urdf/ur3e_cylinders_collision.urdf\"\n",
     "    raise Exception(\"Unknown model\")\n",
     "\n",
     "\n",