diff --git a/src/gui/accessible/qaccessible.cpp b/src/gui/accessible/qaccessible.cpp
index 510931b4760..87b29d8662c 100644
--- a/src/gui/accessible/qaccessible.cpp
+++ b/src/gui/accessible/qaccessible.cpp
@@ -688,6 +688,11 @@ void QAccessible::installActivationObserver(QAccessible::ActivationObserver *obs
     if (qAccessibleActivationObservers()->contains(observer))
         return;
     qAccessibleActivationObservers()->append(observer);
+
+    // Make sure the newly added observer gets a callback on the next
+    // QPlatformAccessibility::setActive() callback
+    if (QPlatformAccessibility *pfAccessibility = platformAccessibility())
+        pfAccessibility->clearActiveNotificationState();
 }
 
 /*!
@@ -701,6 +706,17 @@ void QAccessible::removeActivationObserver(ActivationObserver *observer)
     qAccessibleActivationObservers()->removeAll(observer);
 }
 
+/*!
+    \internal
+
+    Sends accessibility activation notifications to all registered observers.
+*/
+void qAccessibleNotifyActivationObservers(bool active)
+{
+    for (int i = 0; i < qAccessibleActivationObservers()->size(); ++i)
+        qAccessibleActivationObservers()->at(i)->accessibilityActiveChanged(active);
+}
+
 /*!
     If a QAccessibleInterface implementation exists for the given \a object,
     this function returns a pointer to the implementation; otherwise it
@@ -870,11 +886,10 @@ bool QAccessible::isActive()
 */
 void QAccessible::setActive(bool active)
 {
-    for (int i = 0; i < qAccessibleActivationObservers()->size() ;++i)
-        qAccessibleActivationObservers()->at(i)->accessibilityActiveChanged(active);
+    if (QPlatformAccessibility *pfAccessibility = platformAccessibility())
+        pfAccessibility->setActive(active);
 }
 
-
 /*!
   Sets the root object of the accessible objects of this application
   to \a object.  All other accessible objects are reachable using object
diff --git a/src/gui/accessible/qplatformaccessibility.cpp b/src/gui/accessible/qplatformaccessibility.cpp
index ae7635ff7c9..4dd32a911c7 100644
--- a/src/gui/accessible/qplatformaccessibility.cpp
+++ b/src/gui/accessible/qplatformaccessibility.cpp
@@ -35,7 +35,6 @@ Q_GLOBAL_STATIC(QList<QAccessibleBridge *>, bridges)
     \sa QAccessible
 */
 QPlatformAccessibility::QPlatformAccessibility()
-    : m_active(false)
 {
 }
 
@@ -99,10 +98,25 @@ void QPlatformAccessibility::cleanup()
     qDeleteAll(*bridges());
 }
 
+void qAccessibleNotifyActivationObservers(bool active); // qaccessible.cpp
+
 void QPlatformAccessibility::setActive(bool active)
 {
     m_active = active;
-    QAccessible::setActive(active);
+
+    // Send activeChanged notifications if the new active status differs from
+    // the notifed one.
+    if ((active && m_activeNotificationState != std::optional<bool>{true}) ||
+        (!active && m_activeNotificationState != std::optional<bool>{false})) {
+        qAccessibleNotifyActivationObservers(active);
+    }
+
+    m_activeNotificationState = active;
+}
+
+void QPlatformAccessibility::clearActiveNotificationState()
+{
+    m_activeNotificationState = std::nullopt;
 }
 
 #endif // QT_CONFIG(accessibility)
diff --git a/src/gui/accessible/qplatformaccessibility.h b/src/gui/accessible/qplatformaccessibility.h
index 004fcfb40fc..d262c2f6585 100644
--- a/src/gui/accessible/qplatformaccessibility.h
+++ b/src/gui/accessible/qplatformaccessibility.h
@@ -19,6 +19,8 @@
 #include <QtCore/qobject.h>
 #include <QtGui/qaccessible.h>
 
+#include <optional>
+
 QT_BEGIN_NAMESPACE
 
 
@@ -35,9 +37,11 @@ public:
 
     inline bool isActive() const { return m_active; }
     void setActive(bool active);
+    void clearActiveNotificationState();
 
 private:
-    bool m_active;
+    bool m_active = false;
+    std::optional<bool> m_activeNotificationState = std::nullopt;
 };
 
 QT_END_NAMESPACE