diff --git a/src/network/socket/qnativesocketengine_win.cpp b/src/network/socket/qnativesocketengine_win.cpp
index b1da704..d228e04 100644
--- a/src/network/socket/qnativesocketengine_win.cpp
+++ b/src/network/socket/qnativesocketengine_win.cpp
@@ -1001,9 +1001,14 @@ qint64 QNativeSocketEnginePrivate::nativeWrite(const char *data, qint64 len)
 {
     Q_Q(QNativeSocketEngine);
     qint64 ret = 0;
-    // don't send more than 49152 per call to WSASendTo to avoid getting a WSAENOBUFS
+    // don't send more than the buffer size per call to WSASend to avoid getting a WSAENOBUFS
+    int sndbuf;
+    int optlen = sizeof sndbuf;
+    if (getsockopt(socketDescriptor, SOL_SOCKET, SO_SNDBUF, (char*)&sndbuf, &optlen) == SOCKET_ERROR)
+        sndbuf = 49152;         // the default value
+
     for (;;) {
-        qint64 bytesToSend = qMin<qint64>(49152, len - ret);
+        qint64 bytesToSend = qMin<qint64>(sndbuf - 1, len - ret);
         WSABUF buf;
         buf.buf = (char*)data + ret;
         buf.len = bytesToSend;
@@ -1018,7 +1023,7 @@ qint64 QNativeSocketEnginePrivate::nativeWrite(const char *data, qint64 len)
             if (ret == len)
                 break;
             else
-                continue;
+                break;
         } else if (WSAGetLastError() == WSAEWOULDBLOCK) {
             break;
         } else {