diff --git a/assets/js/just-the-docs.js b/assets/js/just-the-docs.js
index 308460e338da6b1a93c5e01376bc1b541e15a53d..02161816de8452ca4cbc88ee7d9de0307f2672ef 100644
--- a/assets/js/just-the-docs.js
+++ b/assets/js/just-the-docs.js
@@ -52,8 +52,13 @@ function initSearch() {
     if (request.status >= 200 && request.status < 400) {
       // Success!
       var data = JSON.parse(request.responseText);
-
+      
+      {% if site.search_tokenizer_separator != nil %}
       lunr.tokenizer.separator = {{ site.search_tokenizer_separator }}
+      {% else %}
+      lunr.tokenizer.separator = /[\s\-/]+/
+      {% end %}
+      
       var index = lunr(function () {
         this.ref('id');
         this.field('title', { boost: 200 });