diff --git a/src/charts/areachart/qareaseries.cpp b/src/charts/areachart/qareaseries.cpp
index a2f44a5..9684cea 100644
--- a/src/charts/areachart/qareaseries.cpp
+++ b/src/charts/areachart/qareaseries.cpp
@@ -63,6 +63,9 @@ QT_CHARTS_BEGIN_NAMESPACE
     \image examples_qmlchart4.png
     \endfloat
     \clearfloat
+
+    \note Adding the same line series to chart and area series is not supported. The series used as
+    boundary lines should be defined only for the area series.
 */
 
 /*!