diff --git a/src/gui/kernel/qpalette_p.h b/src/gui/kernel/qpalette_p.h
index 63f1fa2b3f..6b24abf9a4 100644
--- a/src/gui/kernel/qpalette_p.h
+++ b/src/gui/kernel/qpalette_p.h
@@ -19,7 +19,7 @@
 
 QT_BEGIN_NAMESPACE
 
-class QPalettePrivate
+class Q_GUI_EXPORT QPalettePrivate
 {
 public:
     class Data : public QSharedData {