diff -r 56cd8111b7f7 -r 41300fa6a67c qmake/generators/win32/msvc_objectmodel.h
--- a/qmake/generators/win32/msvc_objectmodel.h	Tue Jan 26 12:42:25 2010 +0200
+++ b/qmake/generators/win32/msvc_objectmodel.h	Tue Feb 02 00:43:10 2010 +0200
@@ -298,7 +298,8 @@
 };
 enum machineTypeOption {
     machineNotSet,
-    machineX86
+    machineX86,
+    machineX64 = 17
 };
 enum midlCharOption {
     midlCharUnsigned,