diff --git a/src/gui/symbology-ng/qgsdatadefinedsizelegenddialog.cpp b/src/gui/symbology-ng/qgsdatadefinedsizelegenddialog.cpp
index 3f4d5dc3426..0245b764514 100644
--- a/src/gui/symbology-ng/qgsdatadefinedsizelegenddialog.cpp
+++ b/src/gui/symbology-ng/qgsdatadefinedsizelegenddialog.cpp
@@ -172,7 +172,8 @@ void QgsDataDefinedSizeLegendDialog::changeSymbol()
     ec << QgsExpressionContextUtils::mapSettingsScope( mMapCanvas->mapSettings() );
   context.setExpressionContext( &ec );
 
-  std::unique_ptr<QgsVectorLayer> layer( new QgsVectorLayer( "Point", "tmp", "memory" ) );
+  QString crsAuthId = mMapCanvas ? mMapCanvas->mapSettings().destinationCrs().authid() : QString();
+  std::unique_ptr<QgsVectorLayer> layer( new QgsVectorLayer( "Point?crs=" + crsAuthId, "tmp", "memory" ) );
 
   QgsSymbolSelectorDialog d( newSymbol.get(), QgsStyle::defaultStyle(), layer.get(), this );
   d.setContext( context );
diff --git a/src/gui/symbology-ng/qgssinglesymbolrendererwidget.cpp b/src/gui/symbology-ng/qgssinglesymbolrendererwidget.cpp
index 493fc9cb2be..836a5f4f2b0 100644
--- a/src/gui/symbology-ng/qgssinglesymbolrendererwidget.cpp
+++ b/src/gui/symbology-ng/qgssinglesymbolrendererwidget.cpp
@@ -64,7 +64,8 @@ QgsSingleSymbolRendererWidget::QgsSingleSymbolRendererWidget( QgsVectorLayer *la
   // advanced actions - data defined rendering
   QMenu *advMenu = mSelector->advancedMenu();
 
-  advMenu->addAction( tr( "Symbol levels..." ), this, &QgsSingleSymbolRendererWidget::showSymbolLevels );
+  QAction *actionLevels = advMenu->addAction( tr( "Symbol levels..." ) );
+  connect( actionLevels, &QAction::triggered, this, &QgsSingleSymbolRendererWidget::showSymbolLevels );
   if ( mSingleSymbol->type() == QgsSymbol::Marker )
   {
     QAction *actionDdsLegend = advMenu->addAction( tr( "Data-defined size legend..." ) );