--- a/src/gui/text/qtextdocument.cpp	Mon May 03 13:17:34 2010 +0300
+++ b/src/gui/text/qtextdocument.cpp	Fri May 14 16:40:13 2010 +0300
@@ -1631,7 +1631,7 @@
     painter->restore();
 }
 
-extern int qt_defaultDpi();
+Q_GUI_EXPORT extern int qt_defaultDpi();
 
 /*!
     Prints the document to the given \a printer. The QPrinter must be