--- channels/sip/include/sip.h.orig	2011-09-30 22:51:20.000000000 +0200
+++ channels/sip/include/sip.h	2011-10-01 01:04:53.000000000 +0200
@@ -356,9 +356,10 @@
 
 #define SIP_PAGE3_SNOM_AOC               (1 << 0)  /*!< DPG: Allow snom aoc messages */
 #define SIP_PAGE3_SRTP_TAG_32            (1 << 1)  /*!< DP: Use a 32bit auth tag in INVITE not 80bit */
+#define SIP_PAGE3_NAT_AUTO               (1 << 2)  /*!< PGP: Autodetect NAT */
 
 #define SIP_PAGE3_FLAGS_TO_COPY \
-	(SIP_PAGE3_SNOM_AOC | SIP_PAGE3_SRTP_TAG_32)
+	(SIP_PAGE3_SNOM_AOC | SIP_PAGE3_SRTP_TAG_32 | SIP_PAGE3_NAT_AUTO)
 
 #define CHECK_AUTH_BUF_INITLEN   256