diff --git a/l4d2web/l4d2web/static/js/console-autocomplete.js b/l4d2web/l4d2web/static/js/console-autocomplete.js
index 846002f..644fe5b 100644
--- a/l4d2web/l4d2web/static/js/console-autocomplete.js
+++ b/l4d2web/l4d2web/static/js/console-autocomplete.js
@@ -18,6 +18,9 @@ const MAX_RENDERED = 8;
 // Module-scoped state.
 let vocabPromise = null;
 let vocab = null;
+// activeBinding assumes a single dropdown open at a time. Today the
+// project has one console form per page; multi-form support would
+// need per-form open-state tracking (e.g. a Set) here.
 let activeBinding = null;
 
 function loadVocab() {