diff --git a/lib/member_builder.js b/lib/member_builder.js
index eef4c11..ac56890 100644
--- a/lib/member_builder.js
+++ b/lib/member_builder.js
@@ -71,7 +71,7 @@ exports.buildMethod = function( members, meta, name, value, keywords )
         // disallow overriding properties with methods
         if ( !( prev instanceof Function ) )
         {
-            throw new TypeError(
+            throw TypeError(
                 "Cannot override property '" + name + "' with method"
             );
         }
@@ -90,7 +90,7 @@ exports.buildMethod = function( members, meta, name, value, keywords )
             < ( prev.__length || prev.length )
         )
         {
-            throw new TypeError(
+            throw TypeError(
                 "Declaration of method '" + name + "' must be compatiable " +
                     "with that of its supertype"
             );