diff --git a/src/dbus/qdbusintrospection.cpp b/src/dbus/qdbusintrospection.cpp
index 484d901ad7d..04b5ab77519 100644
--- a/src/dbus/qdbusintrospection.cpp
+++ b/src/dbus/qdbusintrospection.cpp
@@ -21,6 +21,9 @@ QT_BEGIN_NAMESPACE
     But they may prove useful if the XML data was obtained through other means (like parsing a file).
 */
 
+QDBusIntrospection::DiagnosticsReporter::~DiagnosticsReporter()
+    = default;
+
 /*!
     \class QDBusIntrospection::Argument
     \inmodule QtDBus
diff --git a/src/dbus/qdbusintrospection_p.h b/src/dbus/qdbusintrospection_p.h
index a9d96e62a90..766cdffb621 100644
--- a/src/dbus/qdbusintrospection_p.h
+++ b/src/dbus/qdbusintrospection_p.h
@@ -58,9 +58,12 @@ public:
         qint64 columnNumber = 0;
     };
 
-    class DiagnosticsReporter
+    class Q_DBUS_EXPORT DiagnosticsReporter
     {
+        Q_DISABLE_COPY_MOVE(DiagnosticsReporter)
     public:
+        DiagnosticsReporter() = default;
+        virtual ~DiagnosticsReporter();
         virtual void warning(const SourceLocation &location, const char *msg, ...)
                 Q_ATTRIBUTE_FORMAT_PRINTF(3, 4) = 0;
         virtual void error(const SourceLocation &location, const char *msg, ...)