diff --git a/src/gui/accessible/qaccessible.h b/src/gui/accessible/qaccessible.h
index 3d8daa4b3ce..7720786d92a 100644
--- a/src/gui/accessible/qaccessible.h
+++ b/src/gui/accessible/qaccessible.h
@@ -610,7 +610,7 @@ protected:
 class Q_GUI_EXPORT QAccessibleAnnouncementEvent : public QAccessibleEvent
 {
 public:
-    inline QAccessibleAnnouncementEvent(QObject *object, const QString &message)
+    explicit QAccessibleAnnouncementEvent(QObject *object, const QString &message)
         : QAccessibleEvent(object, QAccessible::InvalidEvent)
           , m_message(message)
           , m_priority(QAccessible::AnnouncementPriority::Polite)
@@ -618,7 +618,7 @@ public:
         m_type = QAccessible::Announcement;
     }
 
-    inline QAccessibleAnnouncementEvent(QAccessibleInterface *iface, const QString &message)
+    explicit QAccessibleAnnouncementEvent(QAccessibleInterface *iface, const QString &message)
         : QAccessibleEvent(iface, QAccessible::InvalidEvent)
           , m_message(message)
           , m_priority(QAccessible::AnnouncementPriority::Polite)
@@ -626,7 +626,7 @@ public:
         m_type = QAccessible::Announcement;
     }
 
-    ~QAccessibleAnnouncementEvent();
+    ~QAccessibleAnnouncementEvent() override;
 
     QString message() const { return m_message; }
     QAccessible::AnnouncementPriority priority() const { return m_priority; }
diff --git a/src/gui/accessible/qaccessible_base.h b/src/gui/accessible/qaccessible_base.h
index e164a2ad6bb..46a68a868f5 100644
--- a/src/gui/accessible/qaccessible_base.h
+++ b/src/gui/accessible/qaccessible_base.h
@@ -104,7 +104,8 @@ public:
         Announcement         = 0x80D0,
         IdentifierChanged    = 0x80E0,
 
-        InvalidEvent
+        // was declared after AcceleratorChanged, without explicit value
+        InvalidEvent                    = AcceleratorChanged + 1,
     };
     Q_ENUM(Event)
 
@@ -369,10 +370,11 @@ public:
         Custom,
         Level,
     };
+    Q_ENUM(Attribute)
 
     enum class AnnouncementPriority {
         Polite,
-        Assertive
+        Assertive,
     };
     Q_ENUM(AnnouncementPriority)