diff -r cc75c76972ee -r c0432d11811c src/gui/text/qtextdocumentlayout.cpp
--- a/src/gui/text/qtextdocumentlayout.cpp	Wed Apr 21 12:15:23 2010 +0300
+++ b/src/gui/text/qtextdocumentlayout.cpp	Wed Apr 21 20:15:53 2010 +0300
@@ -75,7 +75,7 @@
 
 QT_BEGIN_NAMESPACE
 
-extern int qt_defaultDpi();
+Q_GUI_EXPORT extern int qt_defaultDpi();
 
 // ################ should probably add frameFormatChange notification!