diff -r cc75c76972ee -r c0432d11811c src/gui/text/qtextdocument.cpp
--- a/src/gui/text/qtextdocument.cpp	Wed Apr 21 12:15:23 2010 +0300
+++ b/src/gui/text/qtextdocument.cpp	Wed Apr 21 20:15:53 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