diff --git a/rbfe_tutorial/python_tutorial.ipynb b/rbfe_tutorial/python_tutorial.ipynb
index ae9c74a..900e818 100644
--- a/rbfe_tutorial/python_tutorial.ipynb
+++ b/rbfe_tutorial/python_tutorial.ipynb
@@ -189,7 +189,7 @@
     "\n",
     "The `LigandNetwork` only knows about the small molecules and the alchemical connections between them. It doesn't know anything about environment (e.g., solvent) or about the `Protocol` that will be used during the simulation.\n",
     "\n",
-    "That information in included in a `Transformation`. Each of these transformations corresponds to a single leg of the simulation campaign, so for each edge in the `LigandNetwork`, we will create two `Transformation`s: one for vacuum and one for solvent.\n",
+    "That information in included in a `Transformation`. Each of these transformations corresponds to a single leg of the simulation campaign, so for each edge in the `LigandNetwork`, we will create two `Transformation`s: one for the complex and one for solvent.\n",
     "\n",
     "In practice, this will be done for each edge of the `LigandNetwork` in a loop, but for illustrative purposes we'll dive into the details of creating a single transformation. In particular, we'll create the solvent leg for the pair of molecules we selecting for the mapping above."
    ]