diff --git a/src/coap/qcoapqudpconnection.cpp b/src/coap/qcoapqudpconnection.cpp
index 27a23e0..636554c 100644
--- a/src/coap/qcoapqudpconnection.cpp
+++ b/src/coap/qcoapqudpconnection.cpp
@@ -164,6 +164,16 @@ QCoapQUdpConnectionPrivate::QCoapQUdpConnectionPrivate(QtCoap::SecurityMode secu
 {
 }
 
+QCoapQUdpConnectionPrivate::~QCoapQUdpConnectionPrivate()
+{
+#if QT_CONFIG(dtls)
+    if (dtls && dtls->isConnectionEncrypted()) {
+        Q_ASSERT(udpSocket);
+        dtls->shutdown(udpSocket);
+    }
+#endif
+}
+
 /*!
     \internal
 
diff --git a/src/coap/qcoapqudpconnection_p.h b/src/coap/qcoapqudpconnection_p.h
index 5491b60..587f5a2 100644
--- a/src/coap/qcoapqudpconnection_p.h
+++ b/src/coap/qcoapqudpconnection_p.h
@@ -57,6 +57,7 @@ class Q_AUTOTEST_EXPORT QCoapQUdpConnectionPrivate : public QCoapConnectionPriva
 {
 public:
     QCoapQUdpConnectionPrivate(QtCoap::SecurityMode security = QtCoap::NoSec);
+    ~QCoapQUdpConnectionPrivate() override;
 
     virtual bool bind();