diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index c33d371e71..40027da779 100644
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -1924,7 +1924,7 @@ void sofia_handle_sip_i_invite(nua_t *nua, sofia_profile_t *profile, nua_handle_
 				}
 			} else if (!strncasecmp(un->un_name, "Remote-Party-ID", 15)) {
 				process_rpid(un, tech_pvt);
-			} else if (!strncasecmp(un->un_name, "X-", 2)) {
+			} else if (!strncasecmp(un->un_name, "X-", 2) || !strncasecmp(un->un_name, "P-", 2)) {
 				if (!switch_strlen_zero(un->un_value)) {
 					char *new_name;
 					if ((new_name = switch_mprintf("%s%s", SOFIA_SIP_HEADER_PREFIX, un->un_name))) {