--- a/mailnews/base/src/nsMsgPrintEngine.cpp
+++ b/mailnews/base/src/nsMsgPrintEngine.cpp
@@ -32,17 +32,16 @@
 
 // Interfaces Needed
 #include "nsIBaseWindow.h"
 #include "nsIDocShellTreeOwner.h"
 #include "nsIDocShellTreeItem.h"
 #include "nsIWebNavigation.h"
 #include "nsContentUtils.h"
 #include "nsIChannel.h"
-#include "nsIContentViewerFile.h"
 #include "nsServiceManagerUtils.h"
 
 static const char* kPrintingPromptService = "@mozilla.org/embedcomp/printingprompt-service;1";
 
 /////////////////////////////////////////////////////////////////////////
 // nsMsgPrintEngine implementation
 /////////////////////////////////////////////////////////////////////////