diff --git a/src/FtpNegotiationCommand.cc b/src/FtpNegotiationCommand.cc
index 1655a775..09e4d1d1 100644
--- a/src/FtpNegotiationCommand.cc
+++ b/src/FtpNegotiationCommand.cc
@@ -101,6 +101,7 @@ FtpNegotiationCommand::FtpNegotiationCommand
   if(seq == SEQ_RECV_GREETING) {
     setTimeout(getOption()->getAsInt(PREF_CONNECT_TIMEOUT));
   }
+  setWriteCheckSocket(getSocket());
 }
 
 FtpNegotiationCommand::~FtpNegotiationCommand() {}