diff --git a/src/Cockpit/wxradar.cxx b/src/Cockpit/wxradar.cxx
index a5b11c992..c7cbed471 100644
--- a/src/Cockpit/wxradar.cxx
+++ b/src/Cockpit/wxradar.cxx
@@ -118,7 +118,6 @@ wxRadarBg::wxRadarBg(SGPropertyNode *node) :
 wxRadarBg::~wxRadarBg ()
 {
     _font_node->removeChangeListener(this);
-    delete _odg;
 }
 
 
@@ -249,6 +248,11 @@ wxRadarBg::init ()
     _time = 0.0;
 }
 
+void wxRadarBg::shutdown()
+{
+    delete _odg;
+    _odg = NULL;
+}
 
 // Local coordinates for each echo
 const osg::Vec3f echoCoords[4] = {
diff --git a/src/Cockpit/wxradar.hxx b/src/Cockpit/wxradar.hxx
index 7aff77717..8aba4c2cb 100644
--- a/src/Cockpit/wxradar.hxx
+++ b/src/Cockpit/wxradar.hxx
@@ -44,6 +44,8 @@ public:
     virtual ~wxRadarBg();
 
     virtual void init();
+    virtual void shutdown();
+    
     virtual void update(double dt);
     virtual void valueChanged(SGPropertyNode *);