diff --git a/src/GUI/QtLauncher.cxx b/src/GUI/QtLauncher.cxx
index 9a1a23f90..2d126ede1 100644
--- a/src/GUI/QtLauncher.cxx
+++ b/src/GUI/QtLauncher.cxx
@@ -299,7 +299,7 @@ private:
             deleteLater(); // commit suicide
         } else {
             m_lineInsertCount += 1000;
-            QTimer::singleShot(50, this, &NaturalEarthDataLoaderThread::onFinished);
+            QTimer::singleShot(50, this, SLOT(onFinished()));
         }
     }