diff --git a/src/app/qgspointmarkeritem.cpp b/src/app/qgspointmarkeritem.cpp
index f11ef9d1730..4739478fab6 100644
--- a/src/app/qgspointmarkeritem.cpp
+++ b/src/app/qgspointmarkeritem.cpp
@@ -166,12 +166,19 @@ QgsMapCanvasLineSymbolItem::QgsMapCanvasLineSymbolItem( QgsMapCanvas *canvas )
   setSymbol( qgis::make_unique< QgsLineSymbol >() );
 }
 
-void QgsMapCanvasLineSymbolItem::setLine( const QLineF &line )
+void QgsMapCanvasLineSymbolItem::setLine( const QPolygonF &line )
 {
   mLine = line;
   update();
 }
 
+void QgsMapCanvasLineSymbolItem::setLine( const QLineF &line )
+{
+  mLine.clear();
+  mLine << line.p1() << line.p2();
+  update();
+}
+
 QRectF QgsMapCanvasLineSymbolItem::boundingRect() const
 {
   return mMapCanvas->rect();
@@ -179,9 +186,7 @@ QRectF QgsMapCanvasLineSymbolItem::boundingRect() const
 
 void QgsMapCanvasLineSymbolItem::renderSymbol( QgsRenderContext &context, const QgsFeature &feature )
 {
-  QPolygonF points;
-  points << mLine.p1() << mLine.p2();
-  lineSymbol()->renderPolyline( points, &feature, context );
+  lineSymbol()->renderPolyline( mLine, &feature, context );
 }
 
 QgsLineSymbol *QgsMapCanvasLineSymbolItem::lineSymbol()
diff --git a/src/app/qgspointmarkeritem.h b/src/app/qgspointmarkeritem.h
index bec7abf333d..351f3bffd54 100644
--- a/src/app/qgspointmarkeritem.h
+++ b/src/app/qgspointmarkeritem.h
@@ -140,6 +140,11 @@ class APP_EXPORT QgsMapCanvasLineSymbolItem: public QgsMapCanvasSymbolItem
 
     QgsMapCanvasLineSymbolItem( QgsMapCanvas *canvas = nullptr );
 
+    /**
+     * Sets the line to draw (in map coordinates)
+     */
+    void setLine( const QPolygonF &line );
+
     /**
      * Sets the line to draw (in map coordinates)
     */
@@ -151,7 +156,7 @@ class APP_EXPORT QgsMapCanvasLineSymbolItem: public QgsMapCanvasSymbolItem
 
   private:
 
-    QLineF mLine;
+    QPolygonF mLine;
 
     QgsLineSymbol *lineSymbol();
 };