diff --git a/src/chartpresenter_p.h b/src/chartpresenter_p.h
index 64193f6..62e1bd4 100644
--- a/src/chartpresenter_p.h
+++ b/src/chartpresenter_p.h
@@ -64,6 +64,7 @@ public:
         BarSeriesZValue = SeriesZValue,
         ScatterSeriesZValue = SeriesZValue,
         PieSeriesZValue = SeriesZValue,
+        BoxPlotSeriesZValue = SeriesZValue,
         LegendZValue,
         TopMostZValue
     };