diff --git a/src/atlas.cpp b/src/atlas.cpp
index 5e500d4d..3b745654 100644
--- a/src/atlas.cpp
+++ b/src/atlas.cpp
@@ -107,6 +107,7 @@ void Atlas::computeBounds()
 Atlas::Atlas(const QString &path, QObject *parent) : Map(parent)
 {
 	_valid = false;
+	_zoom = 0;
 
 	QFileInfo fi(path);
 	_name = fi.fileName();
@@ -139,7 +140,6 @@ Atlas::Atlas(const QString &path, QObject *parent) : Map(parent)
 	computeZooms();
 	computeBounds();
 
-	_zoom = 0;
 	_valid = true;
 }
 
diff --git a/src/offlinemap.cpp b/src/offlinemap.cpp
index 223b986b..5d31ef3c 100644
--- a/src/offlinemap.cpp
+++ b/src/offlinemap.cpp
@@ -328,6 +328,7 @@ OfflineMap::OfflineMap(const QString &path, QObject *parent) : Map(parent)
 	_valid = false;
 	_img = 0;
 	_projection = 0;
+	_resolution = 0;
 
 	QFileInfo fi(path);
 	_name = fi.fileName();