diff --git a/containments/taskpanel/package/contents/ui/main.qml b/containments/taskpanel/package/contents/ui/main.qml
index f9d8f030..9acdc2e2 100644
--- a/containments/taskpanel/package/contents/ui/main.qml
+++ b/containments/taskpanel/package/contents/ui/main.qml
@@ -91,6 +91,12 @@ PlasmaCore.ColorScope {
                 root.setWindowProperties();
             }
         }
+
+        function onThicknessChanged() {
+            if (plasmoid.Window.window.thickness !== root.intendedWindowThickness) {
+                root.setWindowProperties();
+            }
+        }
     }
 
     Component.onCompleted: setWindowProperties();