diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index e4f3b1f7a45d..3dec0e6039dd 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -11766,6 +11766,12 @@ void QgisApp::duplicateLayers( const QList<QgsMapLayer *> &lyrList )
     // always set duplicated layers to not visible so layer can be configured before being turned on
     nodeDupLayer->setItemVisibilityChecked( false );
 
+    // duplicate the layer tree layer's custom properties
+    for ( const QString &key : nodeSelectedLyr->customProperties() )
+    {
+      nodeDupLayer->setCustomProperty( key, nodeSelectedLyr->customProperty( key ) );
+    }
+
     // duplicate the layer style
     QString errMsg;
     QDomDocument style;