diff --git a/src/kcm/package/contents/ui/DeviceListItem.qml b/src/kcm/package/contents/ui/DeviceListItem.qml
--- a/src/kcm/package/contents/ui/DeviceListItem.qml
+++ b/src/kcm/package/contents/ui/DeviceListItem.qml
@@ -90,12 +90,16 @@
 
             RowLayout {
                 MuteButton {
-                    Layout.topMargin: -(height - icon.height) / 2
+                    Layout.alignment: Qt.AlignTop
+                    Layout.topMargin: -(height - volumeSlider.height) / 2
                     muted: Muted
                     onCheckedChanged: Muted = checked
                 }
 
-                VolumeSlider {}
+                VolumeSlider {
+                    id: volumeSlider
+                    Layout.alignment: Qt.AlignTop
+                }
             }
         }
     }
diff --git a/src/kcm/package/contents/ui/StreamListItem.qml b/src/kcm/package/contents/ui/StreamListItem.qml
--- a/src/kcm/package/contents/ui/StreamListItem.qml
+++ b/src/kcm/package/contents/ui/StreamListItem.qml
@@ -77,11 +77,16 @@
 
             RowLayout {
                 MuteButton {
+                    Layout.alignment: Qt.AlignTop
+                    Layout.topMargin: -(height - volumeSlider.height) / 2
                     muted: Muted
                     onCheckedChanged: Muted = checked
                 }
 
-                VolumeSlider {}
+                VolumeSlider {
+                    id: volumeSlider
+                    Layout.alignment: Qt.AlignTop
+                }
             }
         }
     }
diff --git a/src/kcm/package/contents/ui/VolumeSlider.qml b/src/kcm/package/contents/ui/VolumeSlider.qml
--- a/src/kcm/package/contents/ui/VolumeSlider.qml
+++ b/src/kcm/package/contents/ui/VolumeSlider.qml
@@ -39,6 +39,9 @@
         property bool ignoreValueChange: true
 
         Layout.fillWidth: true
+        // Workaround: Slider has 2 extra pixels at the bottom, used for the tickmarks, which move it off-center.
+        Layout.bottomMargin: -Math.round(slider.implicitHeight / 11)
+
         from: PulseAudio.MinimalVolume
         to: PulseAudio.MaximalVolume
         // TODO: implement a way to hide tickmarks