diff --git a/src/plugins/platforms/cocoa/qnsview.mm b/src/plugins/platforms/cocoa/qnsview.mm
index 9103c774c08..453ef9a0cdd 100644
--- a/src/plugins/platforms/cocoa/qnsview.mm
+++ b/src/plugins/platforms/cocoa/qnsview.mm
@@ -63,6 +63,7 @@
 #include <private/qcoregraphics_p.h>
 #include <private/qwindow_p.h>
 #include <private/qpointingdevice_p.h>
+#include <private/qhighdpiscaling_p.h>
 #include "qcocoabackingstore.h"
 #ifndef QT_NO_OPENGL
 #include "qcocoaglcontext.h"
diff --git a/src/plugins/platforms/cocoa/qnsview_mouse.mm b/src/plugins/platforms/cocoa/qnsview_mouse.mm
index f7081503b77..d70d87e40df 100644
--- a/src/plugins/platforms/cocoa/qnsview_mouse.mm
+++ b/src/plugins/platforms/cocoa/qnsview_mouse.mm
@@ -341,7 +341,7 @@ static const QPointingDevice *pointingDeviceFor(qint64 deviceID)
     Q_UNUSED(qtScreenPoint);
 
     // Maintain masked state for the button for use by MouseDragged and MouseUp.
-    QRegion mask = m_platformWindow->window()->mask();
+    QRegion mask = QHighDpi::toNativeLocalPosition(m_platformWindow->window()->mask(), m_platformWindow->window());
     const bool masked = !mask.isEmpty() && !mask.contains(qtWindowPoint.toPoint());
     if (masked)
         m_acceptedMouseDowns &= ~button;
@@ -410,7 +410,7 @@ static const QPointingDevice *pointingDeviceFor(qint64 deviceID)
     [self convertFromScreen:[self screenMousePoint:theEvent] toWindowPoint:&qtWindowPoint andScreenPoint:&qtScreenPoint];
     Q_UNUSED(qtScreenPoint);
 
-    QRegion mask = m_platformWindow->window()->mask();
+    QRegion mask = QHighDpi::toNativeLocalPosition(m_platformWindow->window()->mask(), m_platformWindow->window());
     const bool masked = !mask.isEmpty() && !mask.contains(qtWindowPoint.toPoint());
     // Maintain masked state for the button for use by MouseDragged and Up.
     if (masked)