--- mosh-1.3.2/src/frontend/mosh-server.cc~	2017-07-22 23:14:53.000000000 +0200
+++ mosh-1.3.2/src/frontend/mosh-server.cc	2018-09-24 07:13:02.243766616 +0200
@@ -764,8 +764,8 @@
 	      throw NetworkException( std::string( "serve: getnameinfo: " ) + gai_strerror( errcode ), 0 );
 	    }
 
-	    char tmp[ 64 ];
-	    snprintf( tmp, 64, "%s via mosh [%d]", host, getpid() );
+	    char tmp[ 64 + NI_MAXHOST ];
+	    snprintf( tmp, 64 + NI_MAXHOST, "%s via mosh [%d]", host, getpid() );
 	    utempter_add_record( host_fd, tmp );
 
 	    connected_utmp = true;