diff -r 56cd8111b7f7 -r 41300fa6a67c src/corelib/kernel/qobject.h
--- a/src/corelib/kernel/qobject.h	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/corelib/kernel/qobject.h	Tue Feb 02 00:43:10 2010 +0200
@@ -91,7 +91,11 @@
 # endif
 #endif
 
-class QObjectData {
+class
+#if defined(__INTEL_COMPILER) && defined(Q_OS_WIN)
+Q_CORE_EXPORT
+#endif
+QObjectData {
 public:
     virtual ~QObjectData() = 0;
     QObject *q_ptr;