diff --git a/ThumbnailView/ThumbnailToolTip.cpp b/ThumbnailView/ThumbnailToolTip.cpp
index 76d18ae4..b02a488b 100644
--- a/ThumbnailView/ThumbnailToolTip.cpp
+++ b/ThumbnailView/ThumbnailToolTip.cpp
@@ -1,125 +1,130 @@
 /* Copyright (C) 2003-2018 Jesper K. Pedersen <blackie@kde.org>
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; see the file COPYING.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
 #include "ThumbnailToolTip.h"
 
 #include <QDesktopWidget>
 #include <QApplication>
 #include <QCursor>
 #include <QScreen>
 
 #include "DB/ImageDB.h"
 #include "DB/ImageInfo.h"
 #include "Settings/SettingsData.h"
 #include "ThumbnailWidget.h"
 #include "Utilities/Util.h"
 
 /**
    \class ThumbnailToolTip
    This class takes care of showing tooltips for the individual items in the thumbnail view.
    I tried implementing this with QToolTip::maybeTip() on the iconview, but it had the
    disadvantages that either the tooltip would not follow the
    mouse( and would therefore stand on top of the image), or it flickered.
 */
 
 ThumbnailView::ThumbnailToolTip::ThumbnailToolTip( ThumbnailWidget* view )
     : Utilities::ToolTip(view, Qt::FramelessWindowHint | Qt::Window
                          | Qt::X11BypassWindowManagerHint
                          | Qt::Tool ), m_view( view ),
       m_widthInverse( false ), m_heightInverse( false )
 {
 }
 
 bool ThumbnailView::ThumbnailToolTip::eventFilter( QObject* o , QEvent* event )
 {
     if ( o == m_view->viewport() && event->type() == QEvent::Leave )
         hide();
 
     else if ( event->type() == QEvent::MouseMove || event->type() == QEvent::Wheel) {
         // We need this to be done through a timer, so the thumbnail view gets the wheel even first,
         // otherwise the fileName reported by mediaIdUnderCursor is wrong.
         QTimer::singleShot(0,this, SLOT(requestToolTip()));
     }
 
     return false;
 }
 
 void ThumbnailView::ThumbnailToolTip::requestToolTip()
 {
     const DB::FileName fileName = m_view->mediaIdUnderCursor();
     ToolTip::requestToolTip(fileName);
 }
 
 
 void ThumbnailView::ThumbnailToolTip::setActive( bool b )
 {
     if ( b ) {
         requestToolTip();
         m_view->viewport()->installEventFilter( this );
     }
     else {
         m_view->viewport()->removeEventFilter( this );
         hide();
     }
 }
 
 void ThumbnailView::ThumbnailToolTip::placeWindow()
 {
     // First try to set the position.
     QPoint pos = QCursor::pos() + QPoint( 20, 20 );
     if ( m_widthInverse )
         pos.setX( pos.x() - 30 - width() );
     if ( m_heightInverse )
         pos.setY( pos.y() - 30 - height() );
 
+    // TODO: remove this version check once we don't care about Ubuntu 18.04 LTS anymore
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
     QScreen *screen = qApp->screenAt( QCursor::pos());
     if (!screen)
         return;
     QRect geom = screen->geometry();
+#else
+    QRect geom = qApp->desktop()->screenGeometry( QCursor::pos() );
+#endif
 
     // Now test whether the window moved outside the screen
     if ( m_widthInverse ) {
         if ( pos.x() <  geom.x() ) {
             pos.setX( QCursor::pos().x() + 20 );
             m_widthInverse = false;
         }
     }
     else {
         if ( pos.x() + width() > geom.right() ) {
             pos.setX( QCursor::pos().x() - width() );
             m_widthInverse = true;
         }
     }
 
     if ( m_heightInverse ) {
         if ( pos.y() < geom.y()  ) {
             pos.setY( QCursor::pos().y() + 10 );
             m_heightInverse = false;
         }
     }
     else {
         if ( pos.y() + height() > geom.bottom() ) {
             pos.setY( QCursor::pos().y() - 10 - height() );
             m_heightInverse = true;
         }
     }
 
     move( pos );
 }
 
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