diff --git a/src/network/access/qnetworkreplyhttpimpl.cpp b/src/network/access/qnetworkreplyhttpimpl.cpp
index 44129c6bb27..14980f749aa 100644
--- a/src/network/access/qnetworkreplyhttpimpl.cpp
+++ b/src/network/access/qnetworkreplyhttpimpl.cpp
@@ -2010,7 +2010,7 @@ void QNetworkReplyHttpImplPrivate::setCachingEnabled(bool enable)
 
     if (enable) {
         if (bytesDownloaded) {
-            qDebug("setCachingEnabled: %lld bytesDownloaded", bytesDownloaded);
+            qDebug() << "setCachingEnabled: " << bytesDownloaded << " bytesDownloaded";
             // refuse to enable in this case
             qCritical("QNetworkReplyImpl: backend error: caching was enabled after some bytes had been written");
             return;