diff --git a/user/src/com/google/gwt/core/Core.gwt.xml b/user/src/com/google/gwt/core/Core.gwt.xml
index d88d528..542f427 100644
--- a/user/src/com/google/gwt/core/Core.gwt.xml
+++ b/user/src/com/google/gwt/core/Core.gwt.xml
@@ -20,6 +20,7 @@
 <module>
   <inherits name="com.google.gwt.dev.jjs.intrinsic.Intrinsic" />
   <inherits name="com.google.gwt.emul.Emulation" />
+  <inherits name="com.google.gwt.xhr.XMLHttpRequest" />
 
   <define-linker name="sso" class="com.google.gwt.core.linker.SingleScriptLinker" />
   <define-linker name="std" class="com.google.gwt.core.linker.IFrameLinker" />