diff --git a/src/core/ktcpsocket.h b/src/core/ktcpsocket.h
--- a/src/core/ktcpsocket.h
+++ b/src/core/ktcpsocket.h
@@ -95,6 +95,7 @@
 class KSslErrorPrivate;
 class KTcpSocket;
 
+/** To be replaced by QSslError. */
 class KIOCORE_EXPORT KSslError
 {
 public:
@@ -114,15 +115,21 @@
         HostNameMismatch,
         PathLengthExceeded
     };
-    KSslError(KSslError::Error error = NoError, const QSslCertificate &cert = QSslCertificate());
-    KSslError(const QSslError &error);  //### explicit yes or no?
+    /** @deprecated since 5.63, use the QSslError ctor instead. */
+    KIOCORE_DEPRECATED KSslError(KSslError::Error error = NoError, const QSslCertificate &cert = QSslCertificate());
+    KSslError(const QSslError &error);
     KSslError(const KSslError &other);
     ~KSslError();
     KSslError &operator=(const KSslError &other);
 
     Error error() const;
     QString errorString() const;
     QSslCertificate certificate() const;
+    /**
+     * Returns the QSslError wrapped by this KSslError.
+     * @since 5.63
+     */
+    QSslError sslError() const;
 private:
     KSslErrorPrivate *const d;
 };
diff --git a/src/core/ktcpsocket.cpp b/src/core/ktcpsocket.cpp
--- a/src/core/ktcpsocket.cpp
+++ b/src/core/ktcpsocket.cpp
@@ -323,6 +323,11 @@
     return d->error.certificate();
 }
 
+QSslError KSslError::sslError() const
+{
+    return d->error;
+}
+
 class KTcpSocketPrivate
 {
 public:
diff --git a/src/core/tcpslavebase.cpp b/src/core/tcpslavebase.cpp
--- a/src/core/tcpslavebase.cpp
+++ b/src/core/tcpslavebase.cpp
@@ -103,8 +103,7 @@
         for (int i = 0; i < sslErrors.count(); i++) {
             if (sslErrors[i].certificate().isNull()) {
 				const QList<QSslCertificate> peerCertificateChain = socket.peerCertificateChain();
-                sslErrors[i] = KSslError(sslErrors[i].error(),
-                                         peerCertificateChain[0]);
+                sslErrors[i] = QSslError(sslErrors[i].sslError().error(), peerCertificateChain[0]);
             }
         }