diff -r cc75c76972ee -r c0432d11811c src/gui/kernel/qwhatsthis.cpp
--- a/src/gui/kernel/qwhatsthis.cpp	Wed Apr 21 12:15:23 2010 +0300
+++ b/src/gui/kernel/qwhatsthis.cpp	Wed Apr 21 20:15:53 2010 +0300
@@ -143,7 +143,7 @@
     \sa QToolTip
 */
 
-extern void qDeleteInEventHandler(QObject *o);
+Q_DECL_IMPORT extern void qDeleteInEventHandler(QObject *o);
 
 class QWhatsThat : public QWidget
 {