diff --git a/src/plasmaquick/appletquickitem.cpp b/src/plasmaquick/appletquickitem.cpp
--- a/src/plasmaquick/appletquickitem.cpp
+++ b/src/plasmaquick/appletquickitem.cpp
@@ -41,6 +41,7 @@
 {
 
 QHash<QObject *, AppletQuickItem *> AppletQuickItemPrivate::s_rootObjects = QHash<QObject *, AppletQuickItem *>();
+QHash<QQmlEngine *, QQmlComponent *> AppletQuickItemPrivate::s_qqc1PlasmaStyleComponents;
 
 
 AppletQuickItemPrivate::AppletQuickItemPrivate(Plasma::Applet *a, AppletQuickItem *item)
@@ -490,16 +491,25 @@
     //Force QtQuickControls to use the "Plasma" style for this engine.
     //this way is possible to mix QtQuickControls and plasma components in applets
     //while still having the desktop style in configuration dialogs
-    QQmlComponent c(engine);
-    c.setData(QByteArrayLiteral("import QtQuick 2.1\n\
-        import QtQuick.Controls 1.0\n\
-        import QtQuick.Controls.Private 1.0\n \
-        Item {\
-          Component.onCompleted: {\
-            Settings.styleName = \"Plasma\";\
-          }\
-        }"), QUrl());
-    QObject *o = c.create();
+    QQmlComponent *c = AppletQuickItemPrivate::s_qqc1PlasmaStyleComponents.value(engine);
+    if (!c) {
+        c = new QQmlComponent(engine);
+        // FIXME never executed, even if I kquitapp plasmashell
+        connect(engine, &QObject::destroyed, [engine] {
+            AppletQuickItemPrivate::s_qqc1PlasmaStyleComponents.remove(engine);
+        });
+
+        c->setData(QByteArrayLiteral("import QtQml 2.1\n\
+            import QtQuick.Controls 1.0\n\
+            import QtQuick.Controls.Private 1.0\n \
+            QtObject {\n \
+                Component.onCompleted: Settings.styleName = 'Plasma' \n \
+            }"), QUrl());
+
+        AppletQuickItemPrivate::s_qqc1PlasmaStyleComponents.insert(engine, c);
+    }
+
+    QObject *o = c->create();
     o->deleteLater();
 
     d->qmlObject->setSource(QUrl::fromLocalFile(d->applet->kPackage().filePath("mainscript")));
diff --git a/src/plasmaquick/private/appletquickitem_p.h b/src/plasmaquick/private/appletquickitem_p.h
--- a/src/plasmaquick/private/appletquickitem_p.h
+++ b/src/plasmaquick/private/appletquickitem_p.h
@@ -107,6 +107,7 @@
     bool activationTogglesExpanded : 1;
 
     static QHash<QObject *, AppletQuickItem *> s_rootObjects;
+    static QHash<QQmlEngine *, QQmlComponent *> s_qqc1PlasmaStyleComponents;
 };
 
 }