diff --git a/src/corelib/kernel/qeventdispatcher_glib.cpp b/src/corelib/kernel/qeventdispatcher_glib.cpp
index 520489939b7..b0fcfd78082 100644
--- a/src/corelib/kernel/qeventdispatcher_glib.cpp
+++ b/src/corelib/kernel/qeventdispatcher_glib.cpp
@@ -322,6 +322,9 @@ QEventDispatcherGlibPrivate::QEventDispatcherGlibPrivate(GMainContext *context)
     g_source_attach(&idleTimerSource->source, mainContext);
 }
 
+QEventDispatcherGlibPrivate::~QEventDispatcherGlibPrivate()
+    = default;
+
 void QEventDispatcherGlibPrivate::runTimersOnceWithNormalPriority()
 {
     timerSource->runWithIdlePriority = false;
diff --git a/src/corelib/kernel/qeventdispatcher_glib_p.h b/src/corelib/kernel/qeventdispatcher_glib_p.h
index 30783d38582..2376a7ed8bd 100644
--- a/src/corelib/kernel/qeventdispatcher_glib_p.h
+++ b/src/corelib/kernel/qeventdispatcher_glib_p.h
@@ -65,6 +65,8 @@ class Q_CORE_EXPORT QEventDispatcherGlibPrivate : public QAbstractEventDispatche
 
 public:
     QEventDispatcherGlibPrivate(GMainContext *context = nullptr);
+    ~QEventDispatcherGlibPrivate() override;
+
     GMainContext *mainContext;
     GPostEventSource *postEventSource;
     GSocketNotifierSource *socketNotifierSource;
diff --git a/src/gui/platform/unix/qeventdispatcher_glib.cpp b/src/gui/platform/unix/qeventdispatcher_glib.cpp
index 368006f302f..964d844bd53 100644
--- a/src/gui/platform/unix/qeventdispatcher_glib.cpp
+++ b/src/gui/platform/unix/qeventdispatcher_glib.cpp
@@ -63,6 +63,8 @@ QPAEventDispatcherGlibPrivate::QPAEventDispatcherGlibPrivate(GMainContext *conte
     g_source_attach(&userEventSource->source, mainContext);
 }
 
+QPAEventDispatcherGlibPrivate::~QPAEventDispatcherGlibPrivate()
+    = default;
 
 QPAEventDispatcherGlib::QPAEventDispatcherGlib(QObject *parent)
     : QEventDispatcherGlib(*new QPAEventDispatcherGlibPrivate, parent)
diff --git a/src/gui/platform/unix/qeventdispatcher_glib_p.h b/src/gui/platform/unix/qeventdispatcher_glib_p.h
index 95fac162376..9c8f06f0e97 100644
--- a/src/gui/platform/unix/qeventdispatcher_glib_p.h
+++ b/src/gui/platform/unix/qeventdispatcher_glib_p.h
@@ -43,6 +43,8 @@ class QPAEventDispatcherGlibPrivate : public QEventDispatcherGlibPrivate
     Q_DECLARE_PUBLIC(QPAEventDispatcherGlib)
 public:
     QPAEventDispatcherGlibPrivate(GMainContext *context = nullptr);
+    ~QPAEventDispatcherGlibPrivate() override;
+
     GUserEventSource *userEventSource;
 };
 
diff --git a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h
index a2a46bea5d0..0612894501e 100644
--- a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h
+++ b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h
@@ -110,6 +110,7 @@ class QCocoaEventDispatcherPrivate : public QAbstractEventDispatcherPrivate
 
 public:
     QCocoaEventDispatcherPrivate();
+    ~QCocoaEventDispatcherPrivate() override;
 
     uint processEventsFlags;
 
diff --git a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
index 739fbda4f59..a01801a495b 100644
--- a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
+++ b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
@@ -796,6 +796,9 @@ QCocoaEventDispatcherPrivate::QCocoaEventDispatcherPrivate()
 {
 }
 
+QCocoaEventDispatcherPrivate::~QCocoaEventDispatcherPrivate()
+    = default;
+
 void qt_mac_maybeCancelWaitForMoreEventsForwarder(QAbstractEventDispatcher *eventDispatcher)
 {
     static_cast<QCocoaEventDispatcher *>(eventDispatcher)->d_func()->maybeCancelWaitForMoreEvents();