diff --git a/plasma/applets/system-monitor/system-monitor.cpp b/plasma/applets/system-monitor/system-monitor.cpp
index 3febfd89..192bc950 100644
--- a/plasma/applets/system-monitor/system-monitor.cpp
+++ b/plasma/applets/system-monitor/system-monitor.cpp
@@ -373,6 +373,7 @@ class SystemMonitorClient : public QObject, public KSGRD::SensorClient
     Q_OBJECT
 public:
     SystemMonitorClient(QObject *parent);
+    ~SystemMonitorClient();
 
     bool setup(const QString &hostname, const int port);
     QList<QByteArray> sensors() const;
@@ -402,6 +403,13 @@ SystemMonitorClient::SystemMonitorClient(QObject *parent)
     connect(KSGRD::SensorMgr, SIGNAL(update()), this, SLOT(slotUpdate()));
 }
 
+SystemMonitorClient::~SystemMonitorClient()
+{
+    if (KSGRD::SensorMgr->isConnected(m_hostname)) {
+        KSGRD::SensorMgr->disengage(m_hostname);
+    }
+}
+
 bool SystemMonitorClient::setup(const QString &hostname, const int port)
 {
     if (KSGRD::SensorMgr->isConnected(m_hostname)) {