diff --git a/src/include/os/sgi/osiSock.h b/src/include/os/sgi/osiSock.h
index 431983210..815a58410 100644
--- a/src/include/os/sgi/osiSock.h
+++ b/src/include/os/sgi/osiSock.h
@@ -46,6 +46,10 @@ typedef int osiSockIoctl_t;
 
 #define FD_IN_FDSET(FD) ((FD)<FD_SETSIZE&&(FD)>=0)
 
+#ifndef IPPORT_USERRESERVED
+#define IPPORT_USERRESERVED 5000
+#endif
+
 #define SOCK_EWOULDBLOCK EWOULDBLOCK
 #define SOCK_ENOBUFS ENOBUFS
 #define SOCK_ECONNRESET ECONNRESET
diff --git a/src/libCom/osi/os/sgi/osdSock.h b/src/libCom/osi/os/sgi/osdSock.h
index 431983210..815a58410 100644
--- a/src/libCom/osi/os/sgi/osdSock.h
+++ b/src/libCom/osi/os/sgi/osdSock.h
@@ -46,6 +46,10 @@ typedef int osiSockIoctl_t;
 
 #define FD_IN_FDSET(FD) ((FD)<FD_SETSIZE&&(FD)>=0)
 
+#ifndef IPPORT_USERRESERVED
+#define IPPORT_USERRESERVED 5000
+#endif
+
 #define SOCK_EWOULDBLOCK EWOULDBLOCK
 #define SOCK_ENOBUFS ENOBUFS
 #define SOCK_ECONNRESET ECONNRESET