diff --git a/include/osmocom/mgcp/mgcp.h b/include/osmocom/mgcp/mgcp.h
index f9f0ac7..b866f91 100644
--- a/include/osmocom/mgcp/mgcp.h
+++ b/include/osmocom/mgcp/mgcp.h
@@ -131,6 +131,10 @@
 	MGCP_CRCX_FAIL_NO_REMOTE_CONN_DESC,
 	MGCP_CRCX_FAIL_START_RTP,
 	MGCP_CRCX_FAIL_REJECTED_BY_POLICY,
+	MGCP_CRCX_FAIL_NO_OSMUX,
+	MGCP_CRCX_FAIL_INVALID_CONN_OPTIONS,
+	MGCP_CRCX_FAIL_CODEC_NEGOTIATION,
+	MGCP_CRCX_FAIL_BIND_PORT,
 };
 
 struct mgcp_trunk_config {