diff --git a/src/qchartaxiscategories.h b/src/qchartaxiscategories.h
index ae878ea..16261c6 100644
--- a/src/qchartaxiscategories.h
+++ b/src/qchartaxiscategories.h
@@ -4,7 +4,7 @@
 
 QTCOMMERCIALCHART_BEGIN_NAMESPACE
 
-class QChartAxisCategories : public QObject
+class QTCOMMERCIALCHART_EXPORT QChartAxisCategories : public QObject
 {
     Q_OBJECT
 private: