diff -r 56cd8111b7f7 -r 41300fa6a67c src/corelib/thread/qbasicatomic.h
--- a/src/corelib/thread/qbasicatomic.h	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/corelib/thread/qbasicatomic.h	Tue Feb 02 00:43:10 2010 +0200
@@ -137,7 +137,12 @@
 #if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE)
     union {
         T * volatile _q_value;
-        long volatile _q_value_integral;
+#  if !defined(Q_OS_WINCE) && !defined(__i386__) && !defined(_M_IX86)
+        qint64
+#  else
+        long
+#  endif
+        volatile _q_value_integral;
     };
 #else
     T * volatile _q_value;