diff --git a/apps/master/MasterServer.cpp b/apps/master/MasterServer.cpp
index 3f408ea2b..f09c58ee3 100644
--- a/apps/master/MasterServer.cpp
+++ b/apps/master/MasterServer.cpp
@@ -138,7 +138,7 @@ void MasterServer::Thread()
                             else if (pma.GetFunc() == PacketMasterAnnounce::FUNCTION_ANNOUNCE)
                             {
                                 cout << "Updated";
-                                iter = servers.insert({packet->systemAddress, server}).first;
+                                iter->second = server;
                                 keepAliveFunc();
                             }
                             else