diff --git a/sdrbase/dsp/spectrumvis.h b/sdrbase/dsp/spectrumvis.h
index 9b0ed80f1..efa1ecefc 100644
--- a/sdrbase/dsp/spectrumvis.h
+++ b/sdrbase/dsp/spectrumvis.h
@@ -107,7 +107,7 @@ public:
         {}
     };
 
-    class MsgFrequencyZooming : public Message {
+    class SDRBASE_API MsgFrequencyZooming : public Message {
         MESSAGE_CLASS_DECLARATION
 
     public:
diff --git a/sdrgui/gui/glspectrum.cpp b/sdrgui/gui/glspectrum.cpp
index a1838762e..546e23e12 100644
--- a/sdrgui/gui/glspectrum.cpp
+++ b/sdrgui/gui/glspectrum.cpp
@@ -2278,7 +2278,11 @@ void GLSpectrum::wheelEvent(QWheelEvent *event)
 
 void GLSpectrum::frequencyZoom(QWheelEvent *event)
 {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
 	const QPointF& p = event->position();
+#else
+	const QPointF& p = event->pos();
+#endif
 
 	if (event->delta() > 0) // zoom in
 	{