diff --git a/rssguard.pro b/rssguard.pro
index f5d2a0af4..295d84558 100644
--- a/rssguard.pro
+++ b/rssguard.pro
@@ -116,6 +116,7 @@ message(rssguard: Build revision: '$$APP_REVISION'.)
 
 QT += core gui widgets sql network xml printsupport
 CONFIG *= c++11 debug_and_release warn_on
+DEFINES *= QT_USE_QSTRINGBUILDER QT_USE_FAST_CONCATENATION QT_USE_FAST_OPERATOR_PLUS
 
 # Make needed tweaks for RC file getting generated on Windows.
 win32 {
diff --git a/src/network-web/networkfactory.cpp b/src/network-web/networkfactory.cpp
index 96bf077d5..630747b95 100755
--- a/src/network-web/networkfactory.cpp
+++ b/src/network-web/networkfactory.cpp
@@ -129,7 +129,7 @@ QString NetworkFactory::networkErrorText(QNetworkReply::NetworkError error_code)
 }
 
 QNetworkReply::NetworkError NetworkFactory::downloadIcon(const QList<QString> &urls, int timeout, QIcon &output) {
-  QNetworkReply::NetworkError network_result;
+  QNetworkReply::NetworkError network_result = QNetworkReply::UnknownNetworkError;
 
   foreach (const QString &url, urls) {
     const QString google_s2_with_url = QString("http://www.google.com/s2/favicons?domain=%1").arg(url.toHtmlEscaped());