diff --git a/mozilla/webshell/tests/viewer/nsSetupRegistry.cpp b/mozilla/webshell/tests/viewer/nsSetupRegistry.cpp
index fd4980d29ae..a5db22cf5c6 100644
--- a/mozilla/webshell/tests/viewer/nsSetupRegistry.cpp
+++ b/mozilla/webshell/tests/viewer/nsSetupRegistry.cpp
@@ -27,7 +27,6 @@
 #include "nsViewsCID.h"
 #include "nsPluginsCID.h"
 
-#include "nsIBrowserWindow.h"
 #include "nsIWebShell.h"
 #include "nsIDocumentLoader.h"