diff --git a/lib/member_builder.js b/lib/member_builder.js
index ac56890..4bc2665 100644
--- a/lib/member_builder.js
+++ b/lib/member_builder.js
@@ -157,7 +157,17 @@ exports.buildProp = function( members, meta, name, value, keywords )
  */
 exports.buildGetter = function( members, meta, name, value, keywords )
 {
-    getMemberVisibility( members, keywords ).__defineGetter__( name, value );
+    Object.defineProperty(
+        getMemberVisibility( members, keywords ),
+        name,
+        {
+            get:        value,
+            enumerable: true,
+
+            // otherwise we can't add a setter to this
+            configurable: true,
+        }
+    );
 };
 
 
@@ -177,7 +187,17 @@ exports.buildGetter = function( members, meta, name, value, keywords )
  */
 exports.buildSetter = function( members, meta, name, value, keywords )
 {
-    getMemberVisibility( members, keywords ).__defineSetter__( name, value );
+    Object.defineProperty(
+        getMemberVisibility( members, keywords ),
+        name,
+        {
+            set:        value,
+            enumerable: true,
+
+            // otherwise we can't add a getter to this
+            configurable: true,
+        }
+    );
 };
 
 
diff --git a/lib/util.js b/lib/util.js
index fffab55..9403d05 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -25,15 +25,6 @@
 var propParseKeywords = require( './prop_parser' ).parseKeywords;
 
 
-/**
- * Whether getters/setters are supported
- * @var  {boolean}
- */
-var getset = ( Object.prototype.__defineGetter__ === undefined )
-    ? false
-    : true
-;
-
 /**
  * Whether we can actually define properties, or we need to fall back
  *
@@ -220,9 +211,15 @@ exports.propParse = function( data, options )
             continue;
         }
 
+        // retrieve getters/setters, if supported
+        if ( can_define_prop )
+        {
+            var prop_desc = Object.getOwnPropertyDescriptor( data, prop );
+            getter = prop_desc.get;
+            setter = prop_desc.set;
+        }
+
         value  = data[ prop ];
-        getter = ( ( getset ) ? data.__lookupGetter__( prop ) : null );
-        setter = ( ( getset ) ? data.__lookupSetter__( prop ) : null );
 
         parse_data = keywordParser( prop ) || {};
         name       = parse_data.name || prop;
diff --git a/test/test-class-gettersetter.js b/test/test-class-gettersetter.js
index ccee24d..720efa3 100644
--- a/test/test-class-gettersetter.js
+++ b/test/test-class-gettersetter.js
@@ -22,46 +22,60 @@
  * @package test
  */
 
-// don't perform these tests if getters/setters are unsupported
-if ( Object.prototype.__defineGetter__ === undefined )
-{
-    return;
-}
-
 var common = require( './common' ),
     assert = require( 'assert' ),
     Class  = common.require( 'class' ),
+    util   = common.require( 'util' ),
 
     foo_def     = {},
     sub_foo_def = {}
 ;
 
+// don't perform these tests if getters/setters are unsupported
+if ( util.definePropertyFallback() )
+{
+    return;
+}
+
 
 // to prevent syntax errors in browsers that do not support getters/setters in
 // object notation
-foo_def.__defineGetter__( 'foo', function ()
-{
-    return this._foo;
-} );
-foo_def.__defineSetter__( 'foo', function ( val )
-{
-    this._foo = ''+( val );
-} );
-foo_def.__defineGetter__( 'bar', function ()
-{
-    return 'durp';
-} );
-foo_def.__defineSetter__( 'bar', function ( val )
-{
+Object.defineProperty( foo_def, 'foo', {
+    get: function ()
+    {
+        return this._foo;
+    },
+    set: function ( val )
+    {
+        this._foo = ''+( val );
+    },
+
+    enumerable: true,
 } );
 
-sub_foo_def.__defineGetter__( 'bar', function ()
-{
-    return this.bar2;
+Object.defineProperty( foo_def, 'bar', {
+    get: function ()
+    {
+        return 'durp';
+    },
+    set: function ( val )
+    {
+    },
+
+    enumerable: true,
 } );
-sub_foo_def.__defineSetter__( 'bar', function ( val )
-{
-    this.bar2 = val;
+
+Object.defineProperty( sub_foo_def, 'bar', {
+    get: function ()
+    {
+        return this.bar2;
+    },
+    set: function ( val )
+    {
+        this.bar2 = val;
+    },
+
+    enumerable: true,
 } );
 
 var Foo    = Class.extend( foo_def ),
diff --git a/test/test-interface-extend.js b/test/test-interface-extend.js
index f9197c5..96901c8 100644
--- a/test/test-interface-extend.js
+++ b/test/test-interface-extend.js
@@ -24,7 +24,9 @@
 
 var common    = require( './common' ),
     assert    = require( 'assert' ),
-    Interface = common.require( 'interface' );
+    Interface = common.require( 'interface' ),
+    util      = common.require( 'util' )
+;
 
 
 ( function testPropertiesNotPermittedWithinInterfaces()
@@ -43,7 +45,7 @@ var common    = require( './common' ),
 ( function testGettersAndSettersNotPermittedWithinInterfaces()
 {
     // don't perform this test if unsupported by environment
-    if ( Object.prototype.__defineGetter__ === undefined )
+    if ( util.definePropertyFallback() )
     {
         return;
     }
@@ -51,8 +53,12 @@ var common    = require( './common' ),
     // so we don't break browsers that do not support getters/setters in object
     // notation
     var data = {};
-    data.__defineGetter__( 'foo', function() {} );
-    data.__defineSetter__( 'foo', function() {} );
+    Object.defineProperty( data, 'foo', {
+        get: function() {},
+        set: function() {},
+
+        enumerable: true,
+    } );
 
     assert.throws( function()
     {
diff --git a/test/test-util-prop-parse-keywords.js b/test/test-util-prop-parse-keywords.js
index 7322dd2..04da770 100644
--- a/test/test-util-prop-parse-keywords.js
+++ b/test/test-util-prop-parse-keywords.js
@@ -24,7 +24,8 @@
 
 var common = require( './common' ),
     assert = require( 'assert' ),
-    util   = common.require( 'util' );
+    util   = common.require( 'util' )
+;
 
 
 ( function testAbstractKeywordDesignatesMethodAsAbstract()
@@ -173,15 +174,19 @@ var common = require( './common' ),
 
 
     // for browsers that support it
-    if ( Object.prototype.__defineGetter__ !== undefined )
+    if ( util.definePropertyFallback() === false )
     {
         data            = {};
         parsed_keywords = {};
 
         // to prevent syntax errors for environments that don't support
         // getters/setters in object notation
-        data.__defineGetter__( 'public foo', function() {} );
-        data.__defineSetter__( 'public foo', function() {} );
+        Object.defineProperty( data, 'public foo', {
+            get: function() {},
+            set: function() {},
+
+            enumerable: true,
+        } );
 
 
         util.propParse( data, {
diff --git a/test/test-util-prop-parse.js b/test/test-util-prop-parse.js
index 0debfa8..807a102 100644
--- a/test/test-util-prop-parse.js
+++ b/test/test-util-prop-parse.js
@@ -26,7 +26,7 @@ var common = require( './common' ),
     assert = require( 'assert' ),
     util   = common.require( 'util' ),
 
-    get_set = ( ( Object.prototype.__defineGetter__ ) ? true : false )
+    get_set = !( util.definePropertyFallback() )
 ;
 
 var data = {
@@ -52,8 +52,12 @@ var data = {
 // only add getter/setter if it's supported by our engine
 if ( get_set )
 {
-    data.__defineGetter__( 'someFoo', function () {} );
-    data.__defineSetter__( 'someFoo', function () {} );
+    Object.defineProperty( data, 'someFoo', {
+        get: function () {},
+        set: function () {},
+
+        enumerable: true,
+    } );
 }