diff -urN merkaartor-0.17.2.old/src/MainWindow.cpp merkaartor-0.17.2/src/MainWindow.cpp
--- merkaartor-0.17.2.old/src/MainWindow.cpp	2011-06-09 22:01:46.624543619 +0200
+++ merkaartor-0.17.2/src/MainWindow.cpp	2011-06-09 22:02:27.891027716 +0200
@@ -92,6 +92,7 @@
 #include <QtGui/QFileDialog>
 #include <QtGui/QMessageBox>
 #include <QtGui/QMouseEvent>
+#include <QtNetwork>
 #include <QInputDialog>
 #include <QClipboard>
 #include <QProgressDialog>