diff --git a/src/qtlibtorrent/alertdispatcher.cpp b/src/qtlibtorrent/alertdispatcher.cpp
index ccfd3308c..1ef90885c 100644
--- a/src/qtlibtorrent/alertdispatcher.cpp
+++ b/src/qtlibtorrent/alertdispatcher.cpp
@@ -30,6 +30,7 @@
 
 #include "alertdispatcher.h"
 
+#include <libtorrent/session.hpp>
 #include <boost/bind.hpp>
 #include <QMutexLocker>
 
diff --git a/src/qtlibtorrent/alertdispatcher.h b/src/qtlibtorrent/alertdispatcher.h
index aa2a9ec1f..5ebaf9bc1 100644
--- a/src/qtlibtorrent/alertdispatcher.h
+++ b/src/qtlibtorrent/alertdispatcher.h
@@ -36,7 +36,14 @@
 #include <QWaitCondition>
 #include <QAtomicPointer>
 #include <QSharedPointer>
-#include <libtorrent/session.hpp>
+
+#include <vector>
+#include <memory>
+
+namespace libtorrent {
+  class session;
+  class alert;
+}
 
 class QAlertDispatcher : public QObject {
   Q_OBJECT