diff --git a/src/network/access/qrestreply.cpp b/src/network/access/qrestreply.cpp
index aa32b966f99..3cc62c7efa9 100644
--- a/src/network/access/qrestreply.cpp
+++ b/src/network/access/qrestreply.cpp
@@ -173,7 +173,7 @@ QString QRestReply::readText()
 
     if (!d->decoder) {
         const QByteArray charset = QRestReplyPrivate::contentCharset(wrapped);
-        d->decoder = QStringDecoder(charset.constData());
+        d->decoder.emplace(charset.constData());
         if (!d->decoder->isValid()) { // the decoder may not support the mimetype's charset
             qCWarning(lcQrest, "readText(): Charset \"%s\" is not supported", charset.constData());
             return result;