diff --git a/Gruntfile.js b/Gruntfile.js
index 096370a..173dad7 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -261,12 +261,7 @@ module.exports = function( grunt ) {
 					compress: {
 						"hoist_funs": false,
 						loops: false,
-						unused: false,
-
-						// Support: IE <11
-						// typeofs transformation is unsafe for IE9-10
-						// See https://github.com/mishoo/UglifyJS2/issues/2198
-						typeofs: false
+						unused: false
 					}
 				}
 			}