diff --git a/docs/src/lib/internals.md b/docs/src/lib/internals.md
index 0dad1de..e1e17cf 100644
--- a/docs/src/lib/internals.md
+++ b/docs/src/lib/internals.md
@@ -107,4 +107,5 @@ CrystalNets.check_dimensionality
 CrystalNets.guess_topology
 CrystalNets.guess_topology_dataset
 CrystalNets.recognize_topology
+CrystalNets.total_interpenetration
 ```