diff --git a/extensions/java/xpcom/src/nsJavaXPCOMBindingUtils.h b/extensions/java/xpcom/src/nsJavaXPCOMBindingUtils.h
index cac0d73948a..2aa3ac8b9ad 100644
--- a/extensions/java/xpcom/src/nsJavaXPCOMBindingUtils.h
+++ b/extensions/java/xpcom/src/nsJavaXPCOMBindingUtils.h
@@ -45,6 +45,8 @@
 #include "pldhash.h"
 #include "nsJavaXPTCStub.h"
 #include "nsAutoLock.h"
+#include "nsTHashtable.h"
+#include "nsHashKeys.h"
 
 //#define DEBUG_JAVAXPCOM
 //#define DEBUG_JAVAXPCOM_REFCNT
@@ -110,6 +112,8 @@ extern NativeToJavaProxyMap* gNativeToJavaProxyMap;
 class JavaToXPTCStubMap;
 extern JavaToXPTCStubMap* gJavaToXPTCStubMap;
 
+extern nsTHashtable<nsDepCharHashKey>* gJavaKeywords;
+
 // The Java garbage collector runs in a separate thread.  Since it calls the
 // finalizeProxy() function in nsJavaWrapper.cpp, we need to make sure that
 // all the structures touched by finalizeProxy() are multithread aware.