1 files changed, 2 insertions, 8 deletions
diff --git a/lib/tree.js b/lib/tree.js
index 839b698c..e2fd44b6 100644
--- a/lib/tree.js
+++ b/lib/tree.js
@@ -18,10 +18,7 @@ var tree = {
         if (!obj) {
             throw {
                 name: "ObjectError",
-                message: "there needs to be an object passed in",
-                toString: function () {
-                    return this.name + ": " + this.message
-                }
+                message: "there needs to be an object passed in"
             };
         }
 
@@ -29,10 +26,7 @@ var tree = {
         if (width <= 0) {
             throw {
                 name: "TreeParamError",
-                message: "width must be greater than zero",
-                toString: function () {
-                    return this.name + ": " + this.message
-                }
+                message: "width must be greater than zero"
             };
         }