diff --git a/src/ui/scanflag.cc b/src/ui/scanflag.cc
index 8a85a448..b3b33aa3 100644
--- a/src/ui/scanflag.cc
+++ b/src/ui/scanflag.cc
@@ -52,7 +52,11 @@ void ScanFlag::showScanFlag()
 
   QPoint currentPos = QCursor::pos();
 
-  QRect desktop = QGuiApplication::primaryScreen()->geometry();
+  auto screen = QGuiApplication::screenAt( currentPos );
+  if ( !screen )
+    return;
+
+  QRect desktop = screen->geometry();
 
   QSize windowSize = geometry().size();
 
diff --git a/src/ui/scanpopup.cc b/src/ui/scanpopup.cc
index 5276134e..1885eaf9 100644
--- a/src/ui/scanpopup.cc
+++ b/src/ui/scanpopup.cc
@@ -522,7 +522,11 @@ void ScanPopup::engagePopup( bool forcePopup, bool giveFocus )
 
       QPoint currentPos = QCursor::pos();
 
-      QRect desktop = QGuiApplication::primaryScreen()->geometry();
+      auto screen = QGuiApplication::screenAt( currentPos );
+      if ( !screen )
+        return;
+
+      QRect desktop = screen->geometry();
 
       QSize windowSize = geometry().size();