diff --git a/src/multimedia/audio/qaudioprobe.h b/src/multimedia/audio/qaudioprobe.h
index 1b201ac6..6012284e 100644
--- a/src/multimedia/audio/qaudioprobe.h
+++ b/src/multimedia/audio/qaudioprobe.h
@@ -55,7 +55,7 @@ class QMediaObject;
 class QMediaRecorder;
 
 class QAudioProbePrivate;
-class QAudioProbe : public QObject
+class Q_MULTIMEDIA_EXPORT QAudioProbe : public QObject
 {
     Q_OBJECT
 public:
diff --git a/src/multimedia/controls/qmediaaudioprobecontrol.h b/src/multimedia/controls/qmediaaudioprobecontrol.h
index c2198d14..fd78002a 100644
--- a/src/multimedia/controls/qmediaaudioprobecontrol.h
+++ b/src/multimedia/controls/qmediaaudioprobecontrol.h
@@ -51,7 +51,7 @@ QT_BEGIN_NAMESPACE
 QT_MODULE(Multimedia)
 
 class QAudioBuffer;
-class QMediaAudioProbeControl : public QMediaControl
+class Q_MULTIMEDIA_EXPORT QMediaAudioProbeControl : public QMediaControl
 {
     Q_OBJECT
 public:
diff --git a/src/multimedia/controls/qmediavideoprobecontrol.h b/src/multimedia/controls/qmediavideoprobecontrol.h
index b1575a5a..40e64d38 100644
--- a/src/multimedia/controls/qmediavideoprobecontrol.h
+++ b/src/multimedia/controls/qmediavideoprobecontrol.h
@@ -53,7 +53,7 @@ QT_BEGIN_NAMESPACE
 QT_MODULE(Multimedia)
 
 class QVideoFrame;
-class QMediaVideoProbeControl : public QMediaControl
+class Q_MULTIMEDIA_EXPORT QMediaVideoProbeControl : public QMediaControl
 {
     Q_OBJECT
 public:
diff --git a/src/multimedia/video/qvideoprobe.h b/src/multimedia/video/qvideoprobe.h
index 304f3fff..bfc3e051 100644
--- a/src/multimedia/video/qvideoprobe.h
+++ b/src/multimedia/video/qvideoprobe.h
@@ -55,7 +55,7 @@ class QMediaObject;
 class QMediaRecorder;
 
 class QVideoProbePrivate;
-class QVideoProbe : public QObject
+class Q_MULTIMEDIA_EXPORT QVideoProbe : public QObject
 {
     Q_OBJECT
 public: