diff --git a/src/filewidgets/kfilewidget.cpp b/src/filewidgets/kfilewidget.cpp
--- a/src/filewidgets/kfilewidget.cpp
+++ b/src/filewidgets/kfilewidget.cpp
@@ -2857,6 +2857,7 @@
 {
     d->model->setSupportedSchemes(schemes);
     d->ops->setSupportedSchemes(schemes);
+    d->urlNavigator->setCustomProtocols(schemes);
 }
 
 QStringList KFileWidget::supportedSchemes() const
diff --git a/src/filewidgets/kurlnavigator.h b/src/filewidgets/kurlnavigator.h
--- a/src/filewidgets/kurlnavigator.h
+++ b/src/filewidgets/kurlnavigator.h
@@ -270,8 +270,7 @@
      * If an application supports only some special protocols, they can be set
      * with \a protocols .
      */
-    // KDE5: Think about removing the custom-protocols-property. It had been used
-    // only by one application currently which uses a different approach now.
+    // TODO KF6 rename to setSupportedSchemes to match KDirOperator and KFileWidget
     void setCustomProtocols(const QStringList &protocols);
 
     /**