diff --git a/src/components/slideshow/slideshow.js b/src/components/slideshow/slideshow.js
index 82f541a116..6e2d5c379c 100644
--- a/src/components/slideshow/slideshow.js
+++ b/src/components/slideshow/slideshow.js
@@ -256,7 +256,7 @@ export default function (options) {
     /**
      * Handles zoom changes.
      */
-    function onZoomChange(scale, imageEl, slideEl) {
+    function onZoomChange(swiper, scale, imageEl, slideEl) {
         const zoomImage = slideEl.querySelector('.swiper-zoom-fakeimg');
 
         if (zoomImage) {