diff --git a/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp b/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp
index 584f3b7f0078..4dbb8fe36a9f 100644
--- a/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp
+++ b/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp
@@ -52,6 +52,7 @@
 #include "nsCRT.h"
 #include "nsFIXptr.h"
 #include "nsXPointer.h"
+#include "nsINode.h"
 
 ////////////////////////////////////////////////////////////////////////
 // Define the contructor function for the objects