diff --git a/plugin/oji/MRJ/plugin/Source/LiveConnectNativeMethods.cpp b/plugin/oji/MRJ/plugin/Source/LiveConnectNativeMethods.cpp
index 4d425d63ec07..b507752483d1 100644
--- a/plugin/oji/MRJ/plugin/Source/LiveConnectNativeMethods.cpp
+++ b/plugin/oji/MRJ/plugin/Source/LiveConnectNativeMethods.cpp
@@ -35,6 +35,7 @@
 #include "nsIPluginInstancePeer2.h"
 #include "nsIIOService.h"
 #include "nsIURI.h"
+#include "nsNetCID.h"
 
 #include "MRJPlugin.h"
 #include "MRJContext.h"