diff -r cc75c76972ee -r c0432d11811c src/gui/text/qfontdatabase.cpp
--- a/src/gui/text/qfontdatabase.cpp	Wed Apr 21 12:15:23 2010 +0300
+++ b/src/gui/text/qfontdatabase.cpp	Wed Apr 21 20:15:53 2010 +0300
@@ -83,7 +83,7 @@
 
 #define SMOOTH_SCALABLE 0xffff
 
-extern int qt_defaultDpiY(); // in qfont.cpp
+Q_GUI_EXPORT extern int qt_defaultDpiY(); // in qfont.cpp
 
 bool qt_enable_test_font = false;