diff --git a/app/src/main/assets/linphonerc_factory b/app/src/main/assets/linphonerc_factory
index 2ae29b3f9..e49c58aff 100644
--- a/app/src/main/assets/linphonerc_factory
+++ b/app/src/main/assets/linphonerc_factory
@@ -18,7 +18,7 @@ auto_net_state_mon=1
 auto_answer_replacing_calls=1
 ping_with_options=0
 use_cpim=1
-zrtp_key_agreements_suites=MS_ZRTP_KEY_AGREEMENT_K255_KYB512
+zrtp_key_agreements_suites=MS_ZRTP_KEY_AGREEMENT_K255_MLK512,MS_ZRTP_KEY_AGREEMENT_K255_KYB512
 chat_messages_aggregation_delay=1000
 chat_messages_aggregation=1
 update_presence_model_timestamp_before_publish_expires_refresh=1