diff --git a/library/HTMLPurifier/HTML5Config.php b/library/HTMLPurifier/HTML5Config.php
index 61ef0e2..1acf344 100644
--- a/library/HTMLPurifier/HTML5Config.php
+++ b/library/HTMLPurifier/HTML5Config.php
@@ -49,6 +49,17 @@ public static function createDefault()
         return $config;
     }
 
+    /**
+     * Creates a new config object that inherits from a previous one
+     *
+     * @param  HTMLPurifier_Config $config
+     * @return HTMLPurifier_Config
+     */
+    public static function inherit(HTMLPurifier_Config $config)
+    {
+        return new self($config->def, $config->plist);
+    }
+
     public function getDefinition($type, $raw = false, $optimized = false)
     {
         // Setting HTML.* keys removes any previously instantiated HTML
diff --git a/tests/HTMLPurifier/HTML5ConfigTest.php b/tests/HTMLPurifier/HTML5ConfigTest.php
index 5cff221..3504816 100644
--- a/tests/HTMLPurifier/HTML5ConfigTest.php
+++ b/tests/HTMLPurifier/HTML5ConfigTest.php
@@ -21,4 +21,19 @@ public function testCreate()
         $this->assertInstanceOf('HTMLPurifier_Config', $config4);
         $this->assertEquals('iso-8859-1', $config4->get('Core.Encoding'));
     }
+
+    public function testInherit()
+    {
+        $parent = HTMLPurifier_Config::create(array(
+            'Core.Encoding' => 'iso-8859-2',
+            'HTML.Trusted' => true,
+        ));
+
+        $config = HTMLPurifier_HTML5Config::inherit($parent);
+
+        $this->assertInstanceof('HTMLPurifier_Config', $config);
+        $this->assertSame($parent->def, $config->def);
+        $this->assertEquals('iso-8859-2', $config->get('Core.Encoding'));
+        $this->assertTrue($config->get('HTML.Trusted'));
+    }
 }