diff --git a/extensions/WEBGL_multi_draw/extension.xml b/extensions/WEBGL_multi_draw/extension.xml
index 630384542d..c0c9b39fb9 100644
--- a/extensions/WEBGL_multi_draw/extension.xml
+++ b/extensions/WEBGL_multi_draw/extension.xml
@@ -64,7 +64,7 @@
 
   <idl xml:space="preserve">
 
-[NoInterfaceObject]
+[Exposed=Window, LegacyNoInterfaceObject]
 interface WEBGL_multi_draw {
   undefined multiDrawArraysWEBGL(
       GLenum mode,