diff --git a/src/ol/control/OverviewMap.js b/src/ol/control/OverviewMap.js
index 6a3de53aae..0aaaf3969d 100644
--- a/src/ol/control/OverviewMap.js
+++ b/src/ol/control/OverviewMap.js
@@ -463,8 +463,6 @@ class OverviewMap extends Control {
       box.style.width = width + 'px';
       box.style.height = height + 'px';
       const transform = 'rotate(' + rotation + 'rad)';
-      box.style.msTransform = transform;
-      box.style.webkitTransform = transform;
       box.style.transform = transform;
     }
   }