diff --git a/src/MultiPlayer/multiplaymgr.cxx b/src/MultiPlayer/multiplaymgr.cxx
index bdacbd4..7aea1ff 100644
--- a/src/MultiPlayer/multiplaymgr.cxx
+++ b/src/MultiPlayer/multiplaymgr.cxx
@@ -1439,8 +1439,8 @@ FGMultiplayMgr::SendMyPosition(const FGExternalMotionData& motionInfo)
         //zhongjin
 
         std::string mAirportid = fgGetString("/instrumentation/comm/airport-id");
-        strncpy(MsgHdr->Callsign, mAirportid.c_str(), 4);
-        MsgHdr->Callsign[4 - 1] = '\0';
+        strncpy(MsgHdr->airport, mAirportid.c_str(), 4);
+        MsgHdr->airport[4 - 1] = '\0';
 
 
         float heading = ifce.get_Psi();