Add a header that MSVC requires

diff --git a/src/common/signalproxy.h b/src/common/signalproxy.h
index be6b804..500693f 100644 (file)
--- a/src/common/signalproxy.h
+++ b/src/common/signalproxy.h
@@ -24,6 +24,8 @@
 #include <QEvent>
 #include <QSet>
 
 #include <QEvent>
 #include <QSet>
 

+#include <functional>
+

 #include "protocol.h"
 
 struct QMetaObject;
 #include "protocol.h"
 
 struct QMetaObject;