diff --git a/abstractlocker.h b/abstractlocker.h
--- a/abstractlocker.h
+++ b/abstractlocker.h
@@ -57,7 +57,7 @@
 {
     Q_OBJECT
 public:
-    AbstractLocker();
+    AbstractLocker(QObject *parent);
     virtual ~AbstractLocker();
 
     virtual void showLockWindow() = 0;
diff --git a/abstractlocker.cpp b/abstractlocker.cpp
--- a/abstractlocker.cpp
+++ b/abstractlocker.cpp
@@ -79,8 +79,9 @@
     show();
 }
 
-AbstractLocker::AbstractLocker() :
-    m_background(new BackgroundWindow(this))
+AbstractLocker::AbstractLocker(QObject *parent)
+    : QObject(parent)
+    , m_background(new BackgroundWindow(this))
 {
 }
 
diff --git a/ksldapp.cpp b/ksldapp.cpp
--- a/ksldapp.cpp
+++ b/ksldapp.cpp
@@ -600,10 +600,10 @@
 {
     if (!m_lockWindow) {
         if (m_isX11) {
-            m_lockWindow = new X11Locker();
+            m_lockWindow = new X11Locker(this);
         }
         if (m_isWayland) {
-            m_lockWindow = new WaylandLocker(m_waylandDisplay);
+            m_lockWindow = new WaylandLocker(m_waylandDisplay, this);
         }
         if (!m_lockWindow) {
             return;
diff --git a/waylandlocker.h b/waylandlocker.h
--- a/waylandlocker.h
+++ b/waylandlocker.h
@@ -39,8 +39,8 @@
     Q_OBJECT
 
 public:
-    WaylandLocker(KWayland::Server::Display *display);
-    ~WaylandLocker();
+    WaylandLocker(KWayland::Server::Display *display, QObject *parent);
+    virtual ~WaylandLocker();
 
     void showLockWindow() override;
     void hideLockWindow() override;
diff --git a/waylandlocker.cpp b/waylandlocker.cpp
--- a/waylandlocker.cpp
+++ b/waylandlocker.cpp
@@ -25,8 +25,8 @@
 namespace ScreenLocker
 {
 
-WaylandLocker::WaylandLocker(KWayland::Server::Display *display)
-    : AbstractLocker()
+WaylandLocker::WaylandLocker(KWayland::Server::Display *display, QObject *parent)
+    : AbstractLocker(parent)
 {
     const auto seats = display->seats();
     for (auto s : seats) {
diff --git a/x11locker.h b/x11locker.h
--- a/x11locker.h
+++ b/x11locker.h
@@ -41,7 +41,7 @@
 {
     Q_OBJECT
 public:
-    X11Locker();
+    X11Locker(QObject *parent = nullptr);
     virtual ~X11Locker();
 
     void showLockWindow() override;
diff --git a/x11locker.cpp b/x11locker.cpp
--- a/x11locker.cpp
+++ b/x11locker.cpp
@@ -48,8 +48,8 @@
 namespace ScreenLocker
 {
 
-X11Locker::X11Locker()
-    : AbstractLocker()
+X11Locker::X11Locker(QObject *parent)
+    : AbstractLocker(parent)
     , QAbstractNativeEventFilter()
 {
     initialize();