diff --git a/ChangeLog b/ChangeLog
index a56cdeb..e62f1e8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 0.5.5
 =====
+   4-Apr-2004:  - Realtime Scheduling for RTP proxy
    3-Apr-2004:  - fix: SDP 'c=' items in media part
    2-Apr-2004:  - PID file
   31-Mar-2004:  - accessctl.c: text correction in ERROR output
diff --git a/config.h.in b/config.h.in
index 923b548..062f8e5 100644
--- a/config.h.in
+++ b/config.h.in
@@ -84,12 +84,21 @@
 /* Define if you have POSIX threads libraries and header files. */
 #undef HAVE_PTHREAD
 
+/* Define to 1 if you have the `pthread_setschedparam' function. */
+#undef HAVE_PTHREAD_SETSCHEDPARAM
+
 /* Define to 1 if you have the <pwd.h> header file. */
 #undef HAVE_PWD_H
 
 /* Define to 1 if you have the `read' function. */
 #undef HAVE_READ
 
+/* Define to 1 if you have the `sched_get_priority_max' function. */
+#undef HAVE_SCHED_GET_PRIORITY_MAX
+
+/* Define to 1 if you have the `sched_get_priority_min' function. */
+#undef HAVE_SCHED_GET_PRIORITY_MIN
+
 /* Define to 1 if you have the `select' function. */
 #undef HAVE_SELECT
 
diff --git a/configure.in b/configure.in
index 5c9a925..da25ec6 100644
--- a/configure.in
+++ b/configure.in
@@ -335,6 +335,9 @@ AC_CHECK_FUNCS(hstrerror,,AC_CHECK_LIB(resolv,hstrerror,[
 	       AC_DEFINE_UNQUOTED(HAVE_HSTRERROR)
 	       LIBS="$LIBS -lresolv"]))
 AC_CHECK_FUNCS(inet_pton inet_ntop inet_aton inet_ntoa)
+AC_CHECK_FUNCS(pthread_setschedparam sched_get_priority_min)
+AC_CHECK_FUNCS(sched_get_priority_max)
+
 
 
 dnl
diff --git a/src/rtpproxy_relay.c b/src/rtpproxy_relay.c
index dbc22a9..9d6362e 100644
--- a/src/rtpproxy_relay.c
+++ b/src/rtpproxy_relay.c
@@ -9,7 +9,7 @@
     (at your option) any later version.
     
     Siproxd is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    but WITHOUT ANY WARRANTY; without even the implied warrantry of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
     
@@ -32,6 +32,10 @@
 #include <netinet/in.h>
 #include <signal.h>
 
+#ifdef HAVE_PTHREAD_SETSCHEDPARAM
+   #include <sched.h>
+#endif
+
 #include <osipparser2/osip_parser.h>
 
 #include "siproxd.h"
@@ -103,6 +107,35 @@ int rtp_relay_init( void ) {
    sts=pthread_create(&rtpproxy_tid, NULL, rtpproxy_main, (void *)&arg);
    DEBUGC(DBCLASS_RTP,"created, sts=%i", sts);
 
+   /* set realtime scheduling - if started by root */
+#ifdef HAVE_PTHREAD_SETSCHEDPARAM
+   {
+      int uid,euid;
+      struct sched_param schedparam;
+
+      uid=getuid();
+      euid=geteuid();
+      if (uid != euid) seteuid(0);
+
+      if (geteuid()==0) {
+         int pmin, pmax;
+         /* place ourself at 1/3 of the available priority space */
+         pmin=sched_get_priority_min(SCHED_RR);
+         pmax=sched_get_priority_max(SCHED_RR);
+         schedparam.sched_priority=pmin+(pmax-pmin)/3;
+         DEBUGC(DBCLASS_RTP,"pmin=%i, pmax=%i, using p=%i", pmin, pmax,
+                schedparam.sched_priority);
+         sts=pthread_setschedparam(rtpproxy_tid, SCHED_RR, &schedparam);
+         if (sts != 0) {
+            ERROR("pthread_setschedparam failed: %s", strerror(errno));
+         }
+      } else {
+         WARN("Cannot set realtime scheduling for RTP (start siproxd as root)");
+      }
+      if (uid != euid)  seteuid(euid);
+   }
+#endif
+
    return STS_SUCCESS;
 }