diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index 083ab222fd..bf150906d9 100644
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -1702,6 +1702,7 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 			if (r_sdp && !switch_test_flag(tech_pvt, TFLAG_SDP)) {
 				if (switch_channel_test_flag(channel, CF_BYPASS_MEDIA)) {
 					switch_set_flag_locked(tech_pvt, TFLAG_ANS);
+					switch_set_flag_locked(tech_pvt, TFLAG_SDP);
 					switch_channel_mark_answered(channel);
 					if ((uuid = switch_channel_get_variable(channel, SWITCH_SIGNAL_BOND_VARIABLE))
 						&& (other_session = switch_core_session_locate(uuid))) {