diff --git a/channels/chan_iax.c b/channels/chan_iax.c
index f185ce719e..fda8698796 100755
--- a/channels/chan_iax.c
+++ b/channels/chan_iax.c
@@ -32,6 +32,7 @@
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <sys/time.h>
 #include <sys/signal.h>
@@ -45,6 +46,10 @@
 
 #include "iax.h"
 
+#ifndef IPTOS_MINCOST
+#define IPTOS_MINCOST 0x02
+#endif
+
 /*
  * Uncomment to try experimental IAX bridge optimization,
  * designed to reduce latency when IAX calls cannot
diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 1aaf2880a5..2a547926f5 100755
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -34,6 +34,7 @@
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <sys/time.h>
 #include <sys/signal.h>
@@ -52,6 +53,10 @@
 #include "iax2.h"
 #include "iax2-parser.h"
 
+#ifndef IPTOS_MINCOST
+#define IPTOS_MINCOST 0x02
+#endif
+
 /*
  * Uncomment to try experimental IAX bridge optimization,
  * designed to reduce latency when IAX calls cannot
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 083b3c9e7f..8f88315d70 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -45,8 +45,13 @@
 #include <netdb.h>
 #include <arpa/inet.h>
 #include <sys/signal.h>
+#include <netinet/in_systm.h>
 #include <netinet/ip.h>
 
+#ifndef IPTOS_MINCOST
+#define IPTOS_MINCOST 0x02
+#endif
+
 /* #define VOCAL_DATA_HACK */
 
 #define SIPDUMPER