diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index 24826ced714d..d4c12f8c2ae9 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -2748,7 +2748,8 @@ def definition_body(self):
                               interface.get());
 """ % {"id": name, "name": str_to_const_array(name)})
 
-        if len(self.descriptor.prototypeChain) == 1:
+        parentName = self.descriptor.getParentName()
+        if not parentName:
             if self.descriptor.interface.getExtendedAttribute("ExceptionClass"):
                 getPrototypeProto = "prototype_proto.set(JS_GetErrorPrototype(cx))"
             elif self.descriptor.interface.isIteratorInterface():
@@ -2757,7 +2758,7 @@ def definition_body(self):
                 getPrototypeProto = "prototype_proto.set(JS_GetObjectPrototype(cx, global))"
         else:
             getPrototypeProto = ("%s::GetProtoObject(cx, global, prototype_proto.handle_mut())" %
-                                 toBindingNamespace(self.descriptor.getParentName()))
+                                 toBindingNamespace(parentName))
 
         code = [CGGeneric("""\
 rooted!(in(cx) let mut prototype_proto = ptr::null_mut());
diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index ace4f979be65..bf68603ff136 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -387,6 +387,7 @@ pub mod serviceworkercontainer;
 pub mod serviceworkerglobalscope;
 pub mod serviceworkerregistration;
 pub mod servohtmlparser;
+pub mod servoparser;
 pub mod servoxmlparser;
 pub mod storage;
 pub mod storageevent;
diff --git a/components/script/dom/servohtmlparser.rs b/components/script/dom/servohtmlparser.rs
index a65d9e84a6d8..c0a8896fde05 100644
--- a/components/script/dom/servohtmlparser.rs
+++ b/components/script/dom/servohtmlparser.rs
@@ -14,13 +14,14 @@ use dom::bindings::codegen::Bindings::ServoHTMLParserBinding;
 use dom::bindings::inheritance::Castable;
 use dom::bindings::js::{JS, Root};
 use dom::bindings::refcounted::Trusted;
-use dom::bindings::reflector::{Reflector, reflect_dom_object};
+use dom::bindings::reflector::reflect_dom_object;
 use dom::bindings::str::DOMString;
 use dom::bindings::trace::JSTraceable;
 use dom::document::Document;
 use dom::globalscope::GlobalScope;
 use dom::htmlimageelement::HTMLImageElement;
 use dom::node::Node;
+use dom::servoparser::ServoParser;
 use dom::window::Window;
 use encoding::all::UTF_8;
 use encoding::types::{DecoderTrap, Encoding};
@@ -212,7 +213,7 @@ impl PreInvoke for ParserContext {
 
 #[dom_struct]
 pub struct ServoHTMLParser {
-    reflector_: Reflector,
+    servoparser: ServoParser,
     #[ignore_heap_size_of = "Defined in html5ever"]
     tokenizer: DOMRefCell<Tokenizer>,
     /// Input chunks received but not yet passed to the parser.
@@ -269,7 +270,7 @@ impl ServoHTMLParser {
         let tok = tokenizer::Tokenizer::new(tb, Default::default());
 
         let parser = ServoHTMLParser {
-            reflector_: Reflector::new(),
+            servoparser: ServoParser::new_inherited(),
             tokenizer: DOMRefCell::new(tok),
             pending_input: DOMRefCell::new(vec!()),
             document: JS::from_ref(document),
@@ -305,7 +306,7 @@ impl ServoHTMLParser {
         let tok = tokenizer::Tokenizer::new(tb, tok_opts);
 
         let parser = ServoHTMLParser {
-            reflector_: Reflector::new(),
+            servoparser: ServoParser::new_inherited(),
             tokenizer: DOMRefCell::new(tok),
             pending_input: DOMRefCell::new(vec!()),
             document: JS::from_ref(document),
diff --git a/components/script/dom/servoparser.rs b/components/script/dom/servoparser.rs
new file mode 100644
index 000000000000..18cd881f812f
--- /dev/null
+++ b/components/script/dom/servoparser.rs
@@ -0,0 +1,18 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::reflector::Reflector;
+
+#[dom_struct]
+pub struct ServoParser {
+    reflector: Reflector,
+}
+
+impl ServoParser {
+    pub fn new_inherited() -> Self {
+        ServoParser {
+            reflector: Reflector::new(),
+        }
+    }
+}
diff --git a/components/script/dom/servoxmlparser.rs b/components/script/dom/servoxmlparser.rs
index 2b79a5cf117c..e4f2914dc154 100644
--- a/components/script/dom/servoxmlparser.rs
+++ b/components/script/dom/servoxmlparser.rs
@@ -5,10 +5,11 @@
 use dom::bindings::cell::DOMRefCell;
 use dom::bindings::codegen::Bindings::ServoXMLParserBinding;
 use dom::bindings::js::{JS, Root};
-use dom::bindings::reflector::{Reflector, reflect_dom_object};
+use dom::bindings::reflector::reflect_dom_object;
 use dom::bindings::trace::JSTraceable;
 use dom::document::Document;
 use dom::node::Node;
+use dom::servoparser::ServoParser;
 use dom::window::Window;
 use js::jsapi::JSTracer;
 use msg::constellation_msg::PipelineId;
@@ -31,7 +32,7 @@ pub struct Sink {
 #[must_root]
 #[dom_struct]
 pub struct ServoXMLParser {
-    reflector_: Reflector,
+    servoparser: ServoParser,
     #[ignore_heap_size_of = "Defined in xml5ever"]
     tokenizer: DOMRefCell<Tokenizer>,
     /// Input chunks received but not yet passed to the parser.
@@ -85,7 +86,7 @@ impl ServoXMLParser {
         let tok = tokenizer::XmlTokenizer::new(tb, Default::default());
 
         let parser = ServoXMLParser {
-            reflector_: Reflector::new(),
+            servoparser: ServoParser::new_inherited(),
             tokenizer: DOMRefCell::new(tok),
             pending_input: DOMRefCell::new(vec!()),
             document: JS::from_ref(document),
diff --git a/components/script/dom/webidls/ServoHTMLParser.webidl b/components/script/dom/webidls/ServoHTMLParser.webidl
index b05515dcf3c5..ddf9382ff9a3 100644
--- a/components/script/dom/webidls/ServoHTMLParser.webidl
+++ b/components/script/dom/webidls/ServoHTMLParser.webidl
@@ -7,5 +7,5 @@
 
 // FIXME: find a better way to hide this from content (#3688)
 [NoInterfaceObject, Exposed=(Window,Worker)]
-interface ServoHTMLParser {
+interface ServoHTMLParser : ServoParser {
 };
diff --git a/components/script/dom/webidls/ServoParser.webidl b/components/script/dom/webidls/ServoParser.webidl
new file mode 100644
index 000000000000..435ca1fb90f9
--- /dev/null
+++ b/components/script/dom/webidls/ServoParser.webidl
@@ -0,0 +1,10 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This interface is entirely internal to Servo, and should not be accessible to
+// web pages.
+
+[Exposed=(Window,Worker),
+ Inline]
+interface ServoParser {};
diff --git a/components/script/dom/webidls/ServoXMLParser.webidl b/components/script/dom/webidls/ServoXMLParser.webidl
index 1111499de1be..3f6f03822ad4 100644
--- a/components/script/dom/webidls/ServoXMLParser.webidl
+++ b/components/script/dom/webidls/ServoXMLParser.webidl
@@ -6,6 +6,6 @@
 // web pages.
 
 [NoInterfaceObject, Exposed=(Window,Worker)]
-interface ServoXMLParser {
+interface ServoXMLParser : ServoParser {
 };