diff --git a/Gui/Vrpn/QVrpnArtTrackingClient.cpp b/Gui/Vrpn/QVrpnArtTrackingClient.cpp
index eb062e10c4c29d2f83313d198e412fc053e9bbf7..f1807f4e111fb0c2f59c8d577025ce3bd152e237 100644
--- a/Gui/Vrpn/QVrpnArtTrackingClient.cpp
+++ b/Gui/Vrpn/QVrpnArtTrackingClient.cpp
@@ -24,7 +24,7 @@
 QVrpnArtTrackingClient* QVrpnArtTrackingClient::_singleton = 0;
 
 QVrpnArtTrackingClient::QVrpnArtTrackingClient(QObject* parent /*= NULL*/)
-	: QObject(parent), VrpnArtTrackingClient()
+	: QObject(parent), VrpnArtTrackingClient(), _updateInterval(0)
 {
 	//SpaceNavigatorClient::Instance();
 	_timer = new QTimer(this);