Index: applet/metadata.desktop
===================================================================
--- applet/metadata.desktop
+++ applet/metadata.desktop
@@ -44,6 +44,7 @@
 X-Plasma-MainScript=ui/main.qml
 
 X-Plasma-NotificationArea=true
+X-Plasma-NotificationAreaCategory=Hardware
 X-Plasma-ConfigPlugins=kcm_pulseaudio
 
 X-KDE-PluginInfo-Name=org.kde.plasma.volume