diff --git a/GraphicsView/include/CGAL/Qt/DemosMainWindow_impl.h b/GraphicsView/include/CGAL/Qt/DemosMainWindow_impl.h
index 32fa8676be3..3c035eca68c 100644
--- a/GraphicsView/include/CGAL/Qt/DemosMainWindow_impl.h
+++ b/GraphicsView/include/CGAL/Qt/DemosMainWindow_impl.h
@@ -368,7 +368,7 @@ DemosMainWindow::openRecentFile_aux()
 {
   QAction *action = qobject_cast<QAction *>(sender());
   if (action)
-    emit openRecentFile(action->data().toString());
+    Q_EMIT openRecentFile(action->data().toString());
 }
 
 CGAL_INLINE_FUNCTION
diff --git a/GraphicsView/include/CGAL/Qt/GraphicsViewNavigation_impl.h b/GraphicsView/include/CGAL/Qt/GraphicsViewNavigation_impl.h
index 0570920869f..09d8149c448 100644
--- a/GraphicsView/include/CGAL/Qt/GraphicsViewNavigation_impl.h
+++ b/GraphicsView/include/CGAL/Qt/GraphicsViewNavigation_impl.h
@@ -183,7 +183,7 @@ namespace Qt {
       QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
       QPointF pos = v->mapToScene(mouseEvent->pos());
       QString xy = QString(" ") + QString::number(pos.x(),'g', 6) + " , " + QString::number(pos.y(),'g', 6) + " ";
-      emit mouseCoordinates(xy);
+      Q_EMIT mouseCoordinates(xy);
       if(rectItem->isVisible()) {
 	QPointF size = v->mapToScene(mouseEvent->pos());
 	size = size - rect_first_point;