Index: trace.c =================================================================== --- trace.c +++ trace.c 2009-11-10 02:37:45.000000000 +0100 @@ -39,7 +39,7 @@ err(EX_OSERR, "inet_aton() failed"); logmsg(llDEBUG, "Resolving hostname\n"); if ((host = gethostbyname(target)) == NULL) - errx(EX_NOHOST, hstrerror(h_errno)); + errx(EX_NOHOST, "%s", hstrerror(h_errno)); memcpy(&options.target, (struct in_addr *)host->h_addr, sizeof(options.target)); }