diff -ur qt-win-opensource-src-4.4.3.orig/src/corelib/io/qfsfileengine_win.cpp qt-win-opensource-src-4.4.3/src/corelib/io/qfsfileengine_win.cpp
--- qt-win-opensource-src-4.4.3.orig/src/corelib/io/qfsfileengine_win.cpp	2008-09-27 10:00:55.000000000 +0100
+++ qt-win-opensource-src-4.4.3/src/corelib/io/qfsfileengine_win.cpp	2009-02-06 16:39:50.000000000 +0000
@@ -65,6 +65,7 @@
 #include <ctype.h>
 #include <limits.h>
 #define SECURITY_WIN32
+#include <subauth.h>
 #include <security.h>
 
 #ifndef _INTPTR_T_DEFINED