diff --git a/src/GUI/gearratiographitem.cpp b/src/GUI/gearratiographitem.cpp
index 64a10d82..70d69216 100644
--- a/src/GUI/gearratiographitem.cpp
+++ b/src/GUI/gearratiographitem.cpp
@@ -3,7 +3,7 @@
 #include "gearratiographitem.h"
 
 GearRatioGraphItem::GearRatioGraphItem(const Graph &graph, GraphType type,
-  QGraphicsItem *parent) : GraphItem(graph, type, parent)
+  QGraphicsItem *parent) : GraphItem(graph, type, parent), _top(NAN)
 {
 	qreal val = NAN;
 
diff --git a/src/map/wmsmap.cpp b/src/map/wmsmap.cpp
index 1ffefeb5..efdb0c6b 100644
--- a/src/map/wmsmap.cpp
+++ b/src/map/wmsmap.cpp
@@ -102,7 +102,8 @@ bool WMSMap::loadWMS()
 }
 
 WMSMap::WMSMap(const QString &name, const WMS::Setup &setup, QObject *parent)
-  : Map(parent), _name(name), _setup(setup), _zoom(0), _valid(false)
+  : Map(parent), _name(name), _setup(setup), _tileLoader(0), _zoom(0),
+  _valid(false)
 {
 	if (!QDir().mkpath(tilesDir())) {
 		_errorString = "Error creating tiles dir";
diff --git a/src/map/wmtsmap.cpp b/src/map/wmtsmap.cpp
index b1cd406c..8ddbf26f 100644
--- a/src/map/wmtsmap.cpp
+++ b/src/map/wmtsmap.cpp
@@ -36,7 +36,8 @@ bool WMTSMap::loadWMTS()
 }
 
 WMTSMap::WMTSMap(const QString &name, const WMTS::Setup &setup, QObject *parent)
-  : Map(parent), _name(name), _setup(setup), _zoom(0), _valid(false)
+  : Map(parent), _name(name), _setup(setup), _tileLoader(0), _zoom(0),
+  _valid(false)
 {
 	if (!QDir().mkpath(tilesDir())) {
 		_errorString = "Error creating tiles dir";