diff --git a/src/controls/Action.qml b/src/controls/Action.qml
--- a/src/controls/Action.qml
+++ b/src/controls/Action.qml
@@ -18,7 +18,7 @@
  */
 
 import QtQuick 2.7
-import QtQuick.Controls 2.5 as Controls
+import QtQuick.Controls 2.4 as Controls
 import "private"
 
 /**
diff --git a/src/controls/ActionToolBar.qml b/src/controls/ActionToolBar.qml
--- a/src/controls/ActionToolBar.qml
+++ b/src/controls/ActionToolBar.qml
@@ -19,7 +19,7 @@
 
 import QtQuick 2.7
 import QtQuick.Layouts 1.2
-import QtQuick.Controls 2.5 as Controls
+import QtQuick.Controls 2.4 as Controls
 import org.kde.kirigami 2.5 as Kirigami
 import "private"
 
@@ -170,7 +170,7 @@
 
             kirigamiAction: Kirigami.Action {
                 icon.name: "overflow-menu"
-                children: Array.prototype.map.call(root.actions, i => i).concat(Array.prototype.map.call(hiddenActions, i => i))
+                children: Array.prototype.map.call(root.actions, function (i) { return i }).concat(Array.prototype.map.call(hiddenActions, function (i) { return i }))
             }
 
             menu.submenuComponent: ActionsMenu {
diff --git a/src/controls/ListSectionHeader.qml b/src/controls/ListSectionHeader.qml
--- a/src/controls/ListSectionHeader.qml
+++ b/src/controls/ListSectionHeader.qml
@@ -19,7 +19,7 @@
 
 import QtQuick 2.5
 import QtQuick.Layouts 1.2
-import QtQuick.Controls 2.5 as QQC2
+import QtQuick.Controls 2.4 as QQC2
 import org.kde.kirigami 2.10
 
 /**