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-rw-r--r--examples/charts/chartthemes/themewidget.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/examples/charts/chartthemes/themewidget.h b/examples/charts/chartthemes/themewidget.h
index 3471773e..a863a677 100644
--- a/examples/charts/chartthemes/themewidget.h
+++ b/examples/charts/chartthemes/themewidget.h
@@ -22,8 +22,10 @@
#include <QtWidgets/QWidget>
#include <QtCharts/QChartGlobal>
+QT_BEGIN_NAMESPACE
class QComboBox;
class QCheckBox;
+QT_END_NAMESPACE
QT_CHARTS_BEGIN_NAMESPACE
class QChartView;