diff --git a/src/core/events/onLoad.js b/src/core/events/onLoad.js
index d4c447434..ffa441dd1 100644
--- a/src/core/events/onLoad.js
+++ b/src/core/events/onLoad.js
@@ -3,5 +3,6 @@ import { processLazyPreloader } from '../../shared/process-lazy-preloader.js';
 export default function onLoad(e) {
   const swiper = this;
   processLazyPreloader(swiper, e.target);
+  if (swiper.params.cssMode) return;
   swiper.update();
 }