diff --git a/Z/src/tcpserver/workerbase.h b/Z/src/tcpserver/workerbase.h
index f42806f2c..f88afc914 100755
--- a/Z/src/tcpserver/workerbase.h
+++ b/Z/src/tcpserver/workerbase.h
@@ -6,6 +6,7 @@
 #include <QByteArray>
 #include <QMap>
 #include <QPointer>
+#include <QObject>
 
 #include "tcpserver_export.h"