diff --git a/src/base/vnc/vncserver.cc b/src/base/vnc/vncserver.cc
index f34241968e..4b1ddae307 100644
--- a/src/base/vnc/vncserver.cc
+++ b/src/base/vnc/vncserver.cc
@@ -117,7 +117,7 @@ VncServer::DataEvent::process(int revent)
  */
 VncServer::VncServer(const Params &p)
     : VncInput(p), listenEvent(NULL), dataEvent(NULL), number(p.number),
-      listener(p.port.build(p.name)),
+      dataFd(-1), listener(p.port.build(p.name)),
       sendUpdate(false), supportsRawEnc(false), supportsResizeEnc(false)
 {
     if (p.port)