diff --git a/src/assets.js b/src/assets.js
index 08b233b74..37b5c6255 100644
--- a/src/assets.js
+++ b/src/assets.js
@@ -360,7 +360,7 @@ function startObserving() {
 }
 
 // Wait for the DOM to be fully loaded before starting the observer
-if (document.readyState === 'loading') {
+if (document.readyState !== 'complete') {
   document.addEventListener('DOMContentLoaded', startObserving);
 } else {
   // DOMContentLoaded has already fired