diff --git a/org.kde.desktop/TabBar.qml b/org.kde.desktop/TabBar.qml
--- a/org.kde.desktop/TabBar.qml
+++ b/org.kde.desktop/TabBar.qml
@@ -28,6 +28,12 @@
 T.TabBar {
     id: controlRoot
 
+    /**
+     * border: bool
+     * If true tab border is drawn [default].
+     * When a tab bar is used with a frame it's desirable to set this to false to avoid double borders.
+     */
+
     @DISABLE_UNDER_QQC2_2_4@ palette: Kirigami.Theme.palette
     Kirigami.Theme.colorSet: Kirigami.Theme.Button
     Kirigami.Theme.inherit: false
@@ -77,17 +83,5 @@
                 controlRoot.currentIndex = Math.max(controlRoot.currentIndex - 1, 0);
             }
         }
-
-        Rectangle {
-            anchors {
-                left: parent.left
-                right: parent.right
-                bottom : controlRoot.position == T.TabBar.Header ? parent.bottom : undefined
-                top : controlRoot.position == T.TabBar.Header ? undefined : parent.top
-            }
-            height: 1
-            color: Kirigami.Theme.textColor
-            opacity: 0.4
-        }
     }
 }