diff --git a/lib/bst.js b/lib/bst.js
index 2276f67..0533a90 100644
--- a/lib/bst.js
+++ b/lib/bst.js
@@ -433,9 +433,7 @@ BinarySearchTree.prototype.deleteIfOnlyOneChild = function () {
  * @param {Value} value Optional. If not set, the whole key is deleted. If set, only this value is deleted
  */
 BinarySearchTree.prototype.delete = function (key, value) {
-  var newData = [], replaceWith
-    , self = this
-    ;
+  var replaceWith;
 
   if (!this.hasOwnProperty('key')) { return; }
 
@@ -453,10 +451,9 @@ BinarySearchTree.prototype.delete = function (key, value) {
 
   // Delete only a value
   if (this.data.length > 1 && value !== undefined) {
-    this.data.forEach(function (d) {
-      if (!self.checkValueEquality(d, value)) { newData.push(d); }
-    });
-    self.data = newData;
+    this.data = this.data.filter(function(d) {
+      return !this.checkValueEquality(d, value);
+    }, this);
     return;
   }