diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index ab5897400..94a242a6e 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -1311,6 +1311,7 @@ static void linphone_core_init (LinphoneCore * lc, const LinphoneCoreVTable *vta
 	linphone_core_assign_payload_type(lc,&payload_type_aaceld_22k,-1,"config=F8EE2000; constantDuration=512;  indexDeltaLength=3; indexLength=3; mode=AAC-hbr; profile-level-id=76; sizeLength=13; streamType=5");
 	linphone_core_assign_payload_type(lc,&payload_type_aaceld_44k,-1,"config=F8E82000; constantDuration=512;  indexDeltaLength=3; indexLength=3; mode=AAC-hbr; profile-level-id=76; sizeLength=13; streamType=5");
 	linphone_core_assign_payload_type(lc,&payload_type_opus,-1,"useinbandfec=1; usedtx=1");
+	linphone_core_assign_payload_type(lc,&payload_type_isac,-1,NULL);
 	linphone_core_handle_static_payloads(lc);
 	
 	ms_init();