diff --git a/app/views/render_async/_request_jquery.js.erb b/app/views/render_async/_request_jquery.js.erb
index e5457ea..35fbf75 100644
--- a/app/views/render_async/_request_jquery.js.erb
+++ b/app/views/render_async/_request_jquery.js.erb
@@ -86,7 +86,7 @@ if (window.jQuery) {
     <% if toggle %>
     $(document).on('<%= toggle[:event] || 'click' %>', '<%= toggle[:selector] %>', function(event) {
       event.preventDefault();
-      if (_interval) {
+      if (typeof _interval === 'number') {
         clearInterval(_interval);
         _interval = undefined;
       } else {
diff --git a/app/views/render_async/_request_vanilla.js.erb b/app/views/render_async/_request_vanilla.js.erb
index 298502c..10a2ada 100644
--- a/app/views/render_async/_request_vanilla.js.erb
+++ b/app/views/render_async/_request_vanilla.js.erb
@@ -102,7 +102,7 @@
   [...selectors].forEach(function(selector) {
     selector.addEventListener('<%= toggle[:event] || 'click' %>', function(event) {
       event.preventDefault();
-      if (_interval) {
+      if (typeof _interval === 'number') {
         clearInterval(_interval);
         _interval = undefined;
       } else {