diff --git a/src/shared/compatibility.js b/src/shared/compatibility.js
index e9e35a734..63dc62818 100644
--- a/src/shared/compatibility.js
+++ b/src/shared/compatibility.js
@@ -111,31 +111,6 @@ PDFJS.compatibilityChecked = true;
   });
 })();
 
-// Provides `input.type = 'type'` runtime failure protection.
-// Support: IE9,10.
-(function checkInputTypeNumberAssign() {
-  if (!hasDOM) {
-    return;
-  }
-  var el = document.createElement('input');
-  try {
-    el.type = 'number';
-  } catch (ex) {
-    var inputProto = el.constructor.prototype;
-    var typeProperty = Object.getOwnPropertyDescriptor(inputProto, 'type');
-    Object.defineProperty(inputProto, 'type', {
-      get() {
-        return typeProperty.get.call(this);
-      },
-      set(value) {
-        typeProperty.set.call(this, value === 'number' ? 'text' : value);
-      },
-      enumerable: true,
-      configurable: true,
-    });
-  }
-})();
-
 // Provides correct document.readyState value for legacy browsers.
 // Support: IE9,10.
 (function checkDocumentReadyState() {