diff --git a/sddm-theme/Main.qml b/sddm-theme/Main.qml
--- a/sddm-theme/Main.qml
+++ b/sddm-theme/Main.qml
@@ -427,6 +427,7 @@
 
             PlasmaComponents.ToolButton {
                 text: i18ndc("plasma_lookandfeel_org.kde.lookandfeel", "Button to show/hide virtual keyboard", "Virtual Keyboard")
+                font.pointSize: config.fontSize
                 iconName: inputPanel.keyboardActive ? "input-keyboard-virtual-on" : "input-keyboard-virtual-off"
                 onClicked: inputPanel.showHide()
                 visible: inputPanel.status == Loader.Ready