diff --git a/src/legend/qlegend_p.h b/src/legend/qlegend_p.h
index 35d6893..8d76008 100644
--- a/src/legend/qlegend_p.h
+++ b/src/legend/qlegend_p.h
@@ -40,6 +40,7 @@ class QAbstractSeries;
 class LegendLayout;
 class LegendMarker;
 class Domain;
+class QLegendMarker;
 
 class QLegendPrivate : public QObject
 {
diff --git a/src/legend/qlegendmarker.cpp b/src/legend/qlegendmarker.cpp
index d3a9fc1..2fc6459 100644
--- a/src/legend/qlegendmarker.cpp
+++ b/src/legend/qlegendmarker.cpp
@@ -74,6 +74,11 @@ void QLegendMarker::setVisible(bool visible)
     m_visible = visible;
 }
 
+void QLegendMarker::markersUpdated()
+{
+    // TODO:
+}
+
 #include "moc_qlegendmarker.cpp"
 //#include "moc_qlegendmarker_p.cpp"