diff --git a/pytket/binders/mapping.cpp b/pytket/binders/mapping.cpp
index a8fb0a0a5f..a57d65be0c 100644
--- a/pytket/binders/mapping.cpp
+++ b/pytket/binders/mapping.cpp
@@ -105,7 +105,10 @@ PYBIND11_MODULE(mapping, m) {
       LexiLabellingMethod, std::shared_ptr<LexiLabellingMethod>, RoutingMethod>(
       m, "LexiLabellingMethod",
       "Defines a RoutingMethod for labelling Qubits that uses the "
-      "Lexicographical Comparison approach outlined in arXiv:1902.08091.")
+      "Lexicographical Comparison approach outlined in arXiv:1902.08091.\n"
+      "This method is only labelling interacting qubits that have multi qubit "
+      "gates on them. To get qubits with only single qubits gates or no gates "
+      "at all labelled, too, please use a placer in addition")
       .def(py::init<>(), "LexiLabellingMethod constructor.");
 
   py::class_<