diff --git a/qml/onscreennotification/plasma/main.qml b/qml/onscreennotification/plasma/main.qml
--- a/qml/onscreennotification/plasma/main.qml
+++ b/qml/onscreennotification/plasma/main.qml
@@ -35,8 +35,8 @@
 
     mainItem: RowLayout {
         PlasmaCore.IconItem {
-            Layout.minimumWidth: 64
-            Layout.minimumHeight: 64
+            implicitWidth: PlasmaCore.Units.iconSizes["medium"]
+            implicitHeight: implicitWidth
             source: osd.iconName
             visible: osd.iconName != ""
         }