diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index 6b5e18ec58..ef65a7ce95 100644
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -5281,6 +5281,9 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 		break;
 	case nua_callstate_completing:
 		{
+			const char *invite_full_from = switch_channel_get_variable(tech_pvt->channel, "sip_invite_full_from");
+			const char *invite_full_to = switch_channel_get_variable(tech_pvt->channel, "sip_invite_full_to");
+
 			if (r_sdp && sofia_test_flag(tech_pvt, TFLAG_3PCC_INVITE) && !sofia_test_flag(tech_pvt, TFLAG_SDP)) {
 				sofia_set_flag(tech_pvt, TFLAG_SDP);
 
@@ -5304,12 +5307,18 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 				const char *invite_route_uri = switch_channel_get_variable(tech_pvt->channel, "sip_invite_route_uri");			
 
 				nua_ack(nh, 
-						TAG_IF(!zstr(invite_full_via), SIPTAG_VIA_STR(invite_full_via)),
-						TAG_IF(!zstr(invite_route_uri), SIPTAG_ROUTE_STR(invite_route_uri)),
-						TAG_END());
+					TAG_IF(invite_full_from, SIPTAG_FROM_STR(invite_full_from)),
+					TAG_IF(invite_full_to, SIPTAG_TO_STR(invite_full_to)),
+					TAG_IF(!zstr(invite_full_via), SIPTAG_VIA_STR(invite_full_via)),
+					TAG_IF(!zstr(invite_route_uri), SIPTAG_ROUTE_STR(invite_route_uri)),
+					TAG_END());
 						
 			} else {
-				nua_ack(nh, TAG_IF(!zstr(tech_pvt->user_via), SIPTAG_VIA_STR(tech_pvt->user_via)), TAG_END());
+				nua_ack(nh, 
+					TAG_IF(invite_full_from, SIPTAG_FROM_STR(invite_full_from)),
+					TAG_IF(invite_full_to, SIPTAG_TO_STR(invite_full_to)),
+					TAG_IF(!zstr(tech_pvt->user_via), SIPTAG_VIA_STR(tech_pvt->user_via)), 
+					TAG_END());
 			}
 		}
 		goto done;