diff --git a/acinclude.m4 b/acinclude.m4
index 0c8ccef..64e65d1 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -35,6 +35,19 @@ AC_DEFUN([SIPSAK_TIMER],
 	AC_DEFINE_UNQUOTED(DEFAULT_TIMEOUT, $def_timeout, [Default maximum timeout on waiting for response.])
 ])
 
+AC_DEFUN([SIPSAK_OLD_FQDN],
+[
+    AC_MSG_CHECKING([oldstyle numeric])
+    AC_ARG_ENABLE([ips],
+       AC_HELP_STRING([--disbale-ips], [compile with oldstyle --numeric behavior]),
+       [
+        AC_MSG_RESULT([yes])
+        AC_DEFINE([OLDSTYLE_FQDN], [1], [Oldstyle FQDN behavior])
+       ],
+       [ AC_MSG_RESULT([not requested])
+       ])
+])
+
 AC_DEFUN([CHECK_LIB_CARES],
 [
 	AC_MSG_CHECKING([for ares_version.h])
diff --git a/config.h.in b/config.h.in
index a1e8316..3c7d098 100644
--- a/config.h.in
+++ b/config.h.in
@@ -193,6 +193,9 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
+/* Oldstyle FQDN behavior */
+#undef OLDSTYLE_FQDN
+
 /* Name of package */
 #undef PACKAGE
 
diff --git a/configure b/configure
index b481bfd..f12403e 100755
--- a/configure
+++ b/configure
@@ -1518,6 +1518,7 @@ Optional Features:
   --enable-dependency-tracking   do not reject slow dependency extractors
   --enable-distcc         compile in parallel with distcc
   --enable-timeout=SEC    SIP timer T1 in SEC milliseconds (default 500)
+  --disbale-ips           compile with oldstyle --numeric behavior
 
 Some influential environment variables:
   CC          C compiler command
@@ -8301,6 +8302,27 @@ _ACEOF
 
 
 
+    { echo "$as_me:$LINENO: checking oldstyle numeric" >&5
+echo $ECHO_N "checking oldstyle numeric... $ECHO_C" >&6; }
+    # Check whether --enable-ips was given.
+if test "${enable_ips+set}" = set; then
+  enableval=$enable_ips;
+        { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define OLDSTYLE_FQDN 1
+_ACEOF
+
+
+else
+   { echo "$as_me:$LINENO: result: not requested" >&5
+echo "${ECHO_T}not requested" >&6; }
+
+fi
+
+
+
 ac_config_files="$ac_config_files Makefile"
 
 cat >confcache <<\_ACEOF
diff --git a/configure.ac b/configure.ac
index 3883cc2..fccb815 100644
--- a/configure.ac
+++ b/configure.ac
@@ -83,6 +83,7 @@ else
 fi
 
 SIPSAK_TIMER
+SIPSAK_OLD_FQDN
 
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT
diff --git a/sipsak.c b/sipsak.c
index ef7efba..3e6a890 100644
--- a/sipsak.c
+++ b/sipsak.c
@@ -123,7 +123,12 @@ void print_long_help() {
 		"  --outbound-proxy=HOSTNAME  request target (outbound proxy)\n"
 		"  --hostname=HOSTNAME        overwrites the local hostname in all headers\n"
 		"  --max-forwards=NUMBER      the value for the max-forwards header field\n"
-		"  --numeric                  use FQDN instead of IPs in the Via-Line\n");
+#ifdef OLDSTYLE_FQDN
+		"  --numeric                  use IP instead of FQDN in the Via-Line\n"
+#else
+		"  --numeric                  use FQDN instead of IP in the Via-Line\n"
+#endif
+);
 	printf("  --processes=NUMBER         Divide the workflow among the number of processes\n"
 		"  --auth-username=STRING     username for authentication\n"
 		);
@@ -190,7 +195,11 @@ void print_help() {
 	printf(
 		"  -H HOSTNAME       overwrites the local hostname in all headers\n"
 		"  -m NUMBER         the value for the max-forwards header field\n"
-		"  -n                use FQDN instead of IPs in the Via-Line\n"
+#ifdef OLDSTYLE_FQDN
+		"  -n                use IP instead of FQDN in the Via-Line\n"
+#else
+		"  -n                use FQDN instead of IP in the Via-Line\n"
+#endif
 		"  -i                deactivate the insertion of a Via-Line\n"
 		"  -a PASSWORD       password for authentication\n"
 		"                      (if omitted password=\"\")\n"
@@ -288,7 +297,12 @@ int main(int argc, char *argv[])
 	warning_ext=rand_rem=nonce_count=replace_b=invite=message = 0;
 	sleep_ms=empty_contact=nagios_warn=timing=outbound_proxy=symmetric = 0;
 	namebeg=nameend=maxforw= -1;
-	numeric=via_ins=redirects=fix_crlf=processes = 1;
+#ifdef OLDSTYLE_FQDN
+	numeric = 0;
+#else
+	numeric = 1;
+#endif
+	via_ins=redirects=fix_crlf=processes = 1;
 	username=password=replace_str=hostname=contact_uri=mes_body = NULL;
 	con_dis=auth_username=from_uri=headers=authhash = NULL;
 	scheme = user = host = backup = req = rep = rec = NULL;