diff --git a/js/jquery.itop-set-widget.js b/js/jquery.itop-set-widget.js
index 145cf3fec..fe7d040c4 100644
--- a/js/jquery.itop-set-widget.js
+++ b/js/jquery.itop-set-widget.js
@@ -321,7 +321,23 @@ $.widget('itop.set_widget',
 		},
 
 		_partialCodeRemove: function (setItemCode) {
-			this.partialValues = this.partialValues.filter(item => (item !== setItemCode));
+			this.partialValues = this.partialValues.filter(this._filterArrayOnItem, setItemCode);
+		},
+
+		/**
+		 * Used in _partialCodeRemove, as arrow functions can't be used in MSIE :(
+		 *
+		 * Must provide the value to filter on as the filter thisArg parameter
+		 * see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/filter
+		 *
+		 * @param element
+		 * @param index
+		 * @param array
+		 * @returns {boolean}
+		 * @private
+		 */
+		_filterArrayOnItem: function (element, index, array) {
+			return (item !== this);
 		},
 
 		_isCodeInPartialValues: function (setItemCode) {