diff --git singleapp/qtlocalpeer.cpp singleapp/qtlocalpeer.cpp
index 332b064..c7ce527 100644
--- singleapp/qtlocalpeer.cpp
+++ singleapp/qtlocalpeer.cpp
@@ -41,6 +41,7 @@
 
 #include "qtlocalpeer.h"
 #include <QCoreApplication>
+#include <QDataStream>
 #include <QTime>
 
 #if defined(Q_OS_WIN)