diff --git a/src/core/feeddownloader.cpp b/src/core/feeddownloader.cpp
index 60834c213..b936a6ca7 100755
--- a/src/core/feeddownloader.cpp
+++ b/src/core/feeddownloader.cpp
@@ -23,6 +23,7 @@
 #include <QThread>
 #include <QDebug>
 #include <QThreadPool>
+#include <QMutexLocker>
 
 
 FeedDownloader::FeedDownloader(QObject *parent)