diff --git a/src/map/oruxmap.cpp b/src/map/oruxmap.cpp
index ce148726..1ada1bee 100644
--- a/src/map/oruxmap.cpp
+++ b/src/map/oruxmap.cpp
@@ -351,11 +351,12 @@ OruxMap::OruxMap(const QString &fileName, QObject *parent)
 {
 	if (!readXML(fileName))
 		return;
-
 	if (_zooms.isEmpty()) {
 		_errorString = "No usable zoom level found";
 		return;
 	}
+	std::sort(_zooms.begin(), _zooms.end());
+
 
 	QFileInfo fi(fileName);
 	QDir dir(fi.absoluteDir());
diff --git a/src/map/oruxmap.h b/src/map/oruxmap.h
index 7ece45de..16209e3c 100644
--- a/src/map/oruxmap.h
+++ b/src/map/oruxmap.h
@@ -47,6 +47,8 @@ private:
 		  const Projection &proj, const Transform &transform)
 		  : zoom(zoom), tileSize(tileSize), size(size), projection(proj),
 		  transform(transform) {}
+		bool operator<(const Zoom &other) const
+		  {return zoom < other.zoom;}
 
 		int zoom;
 		QSize tileSize;