diff --git a/src/declarativeimports/plasmacomponents3/ToolButton.qml b/src/declarativeimports/plasmacomponents3/ToolButton.qml
index 15f33c282..e652edd09 100644
--- a/src/declarativeimports/plasmacomponents3/ToolButton.qml
+++ b/src/declarativeimports/plasmacomponents3/ToolButton.qml
@@ -35,7 +35,7 @@ T.ToolButton {
     flat: true
 
     PlasmaCore.ColorScope.inherit: flat
-    PlasmaCore.ColorScope.colorGroup: flat ? parent.PlasmaCore.ColorScope.colorGroup : PlasmaCore.Theme.ButtonColorGroup
+    PlasmaCore.ColorScope.colorGroup: flat && parent ? parent.PlasmaCore.ColorScope.colorGroup : PlasmaCore.Theme.ButtonColorGroup
 
     contentItem: Private.ButtonContent {
         labelText: control.Kirigami.MnemonicData.richTextLabel