diff --git a/doc/source/models/PCSAFT.ipynb b/doc/source/models/PCSAFT.ipynb
index 9b09fd6451da8b974b2c45da117c7820f3aee30b..3eea54b01350fe51b1fc0d837cc48e4422b7ed51 100644
--- a/doc/source/models/PCSAFT.ipynb
+++ b/doc/source/models/PCSAFT.ipynb
@@ -12,6 +12,16 @@
     "The model in teqp requires the user to specify the values of ``sigma``, ``epsilon/kB``, and ``m`` for each substance.  A very few substances are hardcoded in teqp, for testing purposes.  "
    ]
   },
+  {
+   "cell_type": "raw",
+   "id": "d9efd027",
+   "metadata": {
+    "raw_mimetype": "text/restructuredtext"
+   },
+   "source": [
+    "The Python class is here: :py:class:`PCSAFTEOS <teqp.teqp.PCSAFTEOS>`"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,
@@ -113,6 +123,7 @@
   }
  ],
  "metadata": {
+  "celltoolbar": "Raw Cell Format",
   "kernelspec": {
    "display_name": "Python 3 (ipykernel)",
    "language": "python",