diff --git a/web/compatibility.js b/web/compatibility.js
index 0e2dba1be3ec8..98dc839ba6143 100644
--- a/web/compatibility.js
+++ b/web/compatibility.js
@@ -571,7 +571,6 @@ if (typeof PDFJS === 'undefined') {
   }
   window.requestAnimationFrame =
     window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame ||
-    window.oRequestAnimationFrame || window.msRequestAnimationFrame ||
     (function fakeRequestAnimationFrame(callback) {
       window.setTimeout(callback, 20);
     });