diff --git a/src/kcm/package/contents/ui/main.qml b/src/kcm/package/contents/ui/main.qml
--- a/src/kcm/package/contents/ui/main.qml
+++ b/src/kcm/package/contents/ui/main.qml
@@ -35,6 +35,7 @@
     property int maxVolumeValue: PulseAudio.NormalVolume // the applet supports changing this value. We will just assume 65536 (100%)
     ConfigModule.quickHelp: i18nd("kcm_pulseaudio", "This module allows configuring the Pulseaudio sound subsystem.")
     implicitHeight: Kirigami.Units.gridUnit * 28
+    implicitWidth: Kirigami.Units.gridUnit * 28
 
     // TODO: replace this TabBar-plus-Frame-in-a-ColumnLayout with whatever shakes
     // out of https://bugs.kde.org/show_bug.cgi?id=394296