1 files changed, 8 insertions, 0 deletions
diff --git a/js/xpconnect/src/Sandbox.cpp b/js/xpconnect/src/Sandbox.cpp
index 77dbf2d02e..3e931320a9 100644
--- a/js/xpconnect/src/Sandbox.cpp
+++ b/js/xpconnect/src/Sandbox.cpp
@@ -50,6 +50,7 @@
 #include "mozilla/dom/DOMParserBinding.h"
 #include "mozilla/dom/DOMTokenListBinding.h"
 #include "mozilla/dom/ElementBinding.h"
+#include "mozilla/dom/ElementInternalsBinding.h"
 #include "mozilla/dom/EventBinding.h"
 #include "mozilla/dom/Exceptions.h"
 #include "mozilla/dom/IndexedDatabaseManager.h"
@@ -901,6 +902,8 @@ bool xpc::GlobalProperties::Parse(JSContext* cx, JS::HandleObject obj) {
       CSS = true;
     } else if (JS_LinearStringEqualsLiteral(nameStr, "CSSRule")) {
       CSSRule = true;
+    } else if (JS_LinearStringEqualsLiteral(nameStr, "CustomStateSet")) {
+      CustomStateSet = true;
     } else if (JS_LinearStringEqualsLiteral(nameStr, "Document")) {
       Document = true;
     } else if (JS_LinearStringEqualsLiteral(nameStr, "Directory")) {
@@ -1027,6 +1030,11 @@ bool xpc::GlobalProperties::Define(JSContext* cx, JS::HandleObject obj) {
     return false;
   }
 
+  if (CustomStateSet &&
+      !dom::CustomStateSet_Binding::GetConstructorObject(cx)) {
+    return false;
+  }
+
   if (Directory && !dom::Directory_Binding::GetConstructorObject(cx))
     return false;