diff --git a/build.symbian/pjnathU.def b/build.symbian/pjnathU.def
index 6e9d8aa..1749f15 100644
--- a/build.symbian/pjnathU.def
+++ b/build.symbian/pjnathU.def
@@ -38,49 +38,50 @@
 	pj_stun_client_tsx_send_msg              @ 37 NONAME
 	pj_stun_client_tsx_set_data              @ 38 NONAME
 	pj_stun_create_key                       @ 39 NONAME
-	pj_stun_empty_attr_create                @ 40 NONAME
-	pj_stun_errcode_attr_create              @ 41 NONAME
-	pj_stun_get_attr_name                    @ 42 NONAME
-	pj_stun_get_class_name                   @ 43 NONAME
-	pj_stun_get_err_reason                   @ 44 NONAME
-	pj_stun_get_method_name                  @ 45 NONAME
-	pj_stun_msg_add_attr                     @ 46 NONAME
-	pj_stun_msg_add_binary_attr              @ 47 NONAME
-	pj_stun_msg_add_empty_attr               @ 48 NONAME
-	pj_stun_msg_add_errcode_attr             @ 49 NONAME
-	pj_stun_msg_add_msgint_attr              @ 50 NONAME
-	pj_stun_msg_add_sockaddr_attr            @ 51 NONAME
-	pj_stun_msg_add_string_attr              @ 52 NONAME
-	pj_stun_msg_add_uint64_attr              @ 53 NONAME
-	pj_stun_msg_add_uint_attr                @ 54 NONAME
-	pj_stun_msg_add_unknown_attr             @ 55 NONAME
-	pj_stun_msg_check                        @ 56 NONAME
-	pj_stun_msg_create                       @ 57 NONAME
-	pj_stun_msg_create_response              @ 58 NONAME
-	pj_stun_msg_decode                       @ 59 NONAME
-	pj_stun_msg_destroy_tdata                @ 60 NONAME
-	pj_stun_msg_dump                         @ 61 NONAME
-	pj_stun_msg_encode                       @ 62 NONAME
-	pj_stun_msg_find_attr                    @ 63 NONAME
-	pj_stun_msgint_attr_create               @ 64 NONAME
-	pj_stun_session_cancel_req               @ 65 NONAME
-	pj_stun_session_create                   @ 66 NONAME
-	pj_stun_session_create_ind               @ 67 NONAME
-	pj_stun_session_create_req               @ 68 NONAME
-	pj_stun_session_create_res               @ 69 NONAME
-	pj_stun_session_destroy                  @ 70 NONAME
-	pj_stun_session_get_user_data            @ 71 NONAME
-	pj_stun_session_on_rx_pkt                @ 72 NONAME
-	pj_stun_session_retransmit_req           @ 73 NONAME
-	pj_stun_session_send_msg                 @ 74 NONAME
-	pj_stun_session_set_credential           @ 75 NONAME
-	pj_stun_session_set_server_name          @ 76 NONAME
-	pj_stun_session_set_user_data            @ 77 NONAME
-	pj_stun_set_padding_char                 @ 78 NONAME
-	pj_stun_sockaddr_attr_create             @ 79 NONAME
-	pj_stun_string_attr_create               @ 80 NONAME
-	pj_stun_uint64_attr_create               @ 81 NONAME
-	pj_stun_uint_attr_create                 @ 82 NONAME
-	pj_stun_unknown_attr_create              @ 83 NONAME
-	pjnath_init                              @ 84 NONAME
-	pjnath_perror                            @ 85 NONAME
+	pj_stun_detect_nat_type                  @ 40 NONAME
+	pj_stun_empty_attr_create                @ 41 NONAME
+	pj_stun_errcode_attr_create              @ 42 NONAME
+	pj_stun_get_attr_name                    @ 43 NONAME
+	pj_stun_get_class_name                   @ 44 NONAME
+	pj_stun_get_err_reason                   @ 45 NONAME
+	pj_stun_get_method_name                  @ 46 NONAME
+	pj_stun_msg_add_attr                     @ 47 NONAME
+	pj_stun_msg_add_binary_attr              @ 48 NONAME
+	pj_stun_msg_add_empty_attr               @ 49 NONAME
+	pj_stun_msg_add_errcode_attr             @ 50 NONAME
+	pj_stun_msg_add_msgint_attr              @ 51 NONAME
+	pj_stun_msg_add_sockaddr_attr            @ 52 NONAME
+	pj_stun_msg_add_string_attr              @ 53 NONAME
+	pj_stun_msg_add_uint64_attr              @ 54 NONAME
+	pj_stun_msg_add_uint_attr                @ 55 NONAME
+	pj_stun_msg_add_unknown_attr             @ 56 NONAME
+	pj_stun_msg_check                        @ 57 NONAME
+	pj_stun_msg_create                       @ 58 NONAME
+	pj_stun_msg_create_response              @ 59 NONAME
+	pj_stun_msg_decode                       @ 60 NONAME
+	pj_stun_msg_destroy_tdata                @ 61 NONAME
+	pj_stun_msg_dump                         @ 62 NONAME
+	pj_stun_msg_encode                       @ 63 NONAME
+	pj_stun_msg_find_attr                    @ 64 NONAME
+	pj_stun_msgint_attr_create               @ 65 NONAME
+	pj_stun_session_cancel_req               @ 66 NONAME
+	pj_stun_session_create                   @ 67 NONAME
+	pj_stun_session_create_ind               @ 68 NONAME
+	pj_stun_session_create_req               @ 69 NONAME
+	pj_stun_session_create_res               @ 70 NONAME
+	pj_stun_session_destroy                  @ 71 NONAME
+	pj_stun_session_get_user_data            @ 72 NONAME
+	pj_stun_session_on_rx_pkt                @ 73 NONAME
+	pj_stun_session_retransmit_req           @ 74 NONAME
+	pj_stun_session_send_msg                 @ 75 NONAME
+	pj_stun_session_set_credential           @ 76 NONAME
+	pj_stun_session_set_server_name          @ 77 NONAME
+	pj_stun_session_set_user_data            @ 78 NONAME
+	pj_stun_set_padding_char                 @ 79 NONAME
+	pj_stun_sockaddr_attr_create             @ 80 NONAME
+	pj_stun_string_attr_create               @ 81 NONAME
+	pj_stun_uint64_attr_create               @ 82 NONAME
+	pj_stun_uint_attr_create                 @ 83 NONAME
+	pj_stun_unknown_attr_create              @ 84 NONAME
+	pjnath_init                              @ 85 NONAME
+	pjnath_perror                            @ 86 NONAME