diff --git a/src/network/access/qhttpnetworkconnection.cpp b/src/network/access/qhttpnetworkconnection.cpp
index 50cce3a142..68c7b39d61 100644
--- a/src/network/access/qhttpnetworkconnection.cpp
+++ b/src/network/access/qhttpnetworkconnection.cpp
@@ -454,7 +454,12 @@ bool QHttpNetworkConnectionPrivate::handleAuthenticateChallenge(QAbstractSocket
         if (priv->method == QAuthenticatorPrivate::None)
             return false;
 
-        if (priv->phase == QAuthenticatorPrivate::Done) {
+        if (priv->phase == QAuthenticatorPrivate::Done ||
+                (priv->phase == QAuthenticatorPrivate::Start
+                    && priv->method == QAuthenticatorPrivate::Ntlm)) {
+            if (priv->phase == QAuthenticatorPrivate::Start)
+                priv->phase = QAuthenticatorPrivate::Phase1;
+
             pauseConnection();
             if (!isProxy) {
                 if (channels[i].authenticationCredentialsSent) {
diff --git a/src/network/kernel/qauthenticator_p.h b/src/network/kernel/qauthenticator_p.h
index 6cdff484a2..3a2585eb76 100644
--- a/src/network/kernel/qauthenticator_p.h
+++ b/src/network/kernel/qauthenticator_p.h
@@ -91,6 +91,7 @@ public:
 
     enum Phase {
         Start,
+        Phase1,
         Phase2,
         Done,
         Invalid