diff --git a/l4d2web/l4d2web/static/js/console-autocomplete.js b/l4d2web/l4d2web/static/js/console-autocomplete.js
index 7dc6fe4..528133e 100644
--- a/l4d2web/l4d2web/static/js/console-autocomplete.js
+++ b/l4d2web/l4d2web/static/js/console-autocomplete.js
@@ -107,6 +107,10 @@ function bindConsoleAutocomplete(form) {
 
   function recompute() {
     if (!vocab) return;
+    if (typeof window.__rankVocab !== "function") {
+      console.warn("[console-autocomplete] window.__rankVocab unavailable — vocab-rank.bundle.js failed to load?");
+      return;
+    }
     const slice = firstTokenSlice(input.value, input.selectionStart || 0);
     if (!slice || !slice.token) { close(); return; }
     items = window.__rankVocab(slice.token, vocab);