diff --git a/app/javascript/new_design/select2.js b/app/javascript/new_design/select2.js
index 8db01fe6f..ca55d1dd9 100644
--- a/app/javascript/new_design/select2.js
+++ b/app/javascript/new_design/select2.js
@@ -127,6 +127,8 @@ const adresseOptions = {
         text: label,
         geometry
       }));
+      // Allow the user to select an arbitrary address missing from the results,
+      // by adding the plain-text query to the list of results.
       r.unshift({ id: data.query, text: data.query });
       return {
         results: r