diff --git a/mozilla/xpfe/xpviewer/src/nsBrowserWindow.cpp b/mozilla/xpfe/xpviewer/src/nsBrowserWindow.cpp
index be9e66bae64..8af75f4d1de 100644
--- a/mozilla/xpfe/xpviewer/src/nsBrowserWindow.cpp
+++ b/mozilla/xpfe/xpviewer/src/nsBrowserWindow.cpp
@@ -86,12 +86,8 @@
 #if defined(WIN32)
 #include <strstrea.h>
 #else
-#if defined(XP_MAC)
-#include "ostrstream.h"
-#else
 #include <strstream.h>
 #endif
-#endif
 
 #if defined(WIN32)
 #include <windows.h>