diff --git a/include/osmocom/mgcp_client/mgcp_client.h b/include/osmocom/mgcp_client/mgcp_client.h
index 5650fc2..ac3e2b1 100644
--- a/include/osmocom/mgcp_client/mgcp_client.h
+++ b/include/osmocom/mgcp_client/mgcp_client.h
@@ -78,7 +78,7 @@
 	enum mgcp_codecs codecs[MGCP_MAX_CODECS];
 	unsigned int codecs_len;
 	struct ptmap ptmap[MGCP_MAX_CODECS];
-	unsigned int ptmap_len;	
+	unsigned int ptmap_len;
 };
 
 enum mgcp_verb {
@@ -113,6 +113,8 @@
 	struct ptmap ptmap[MGCP_MAX_CODECS];
 	unsigned int ptmap_len;
 	uint32_t x_osmo_ign;
+	bool param_present;
+	struct mgcp_codec_param param;
 };
 
 void mgcp_client_conf_init(struct mgcp_client_conf *conf);
diff --git a/include/osmocom/mgcp_client/mgcp_client_fsm.h b/include/osmocom/mgcp_client/mgcp_client_fsm.h
index 716a6d4..dabfcca 100644
--- a/include/osmocom/mgcp_client/mgcp_client_fsm.h
+++ b/include/osmocom/mgcp_client/mgcp_client_fsm.h
@@ -51,6 +51,11 @@
 	/*! If left MGCP_CONN_NONE, use MGCP_CONN_RECV_ONLY or MGCP_CONN_RECV_SEND, depending on whether an audio RTP
 	 * address is set. If != MGCP_CONN_NONE, force this conn mode. */
 	enum mgcp_connection_mode conn_mode;
+
+	/*! If the codec requires additional format parameters (fmtp), those cann be set here, see also
+	 * mgcp_common.h */
+	bool param_present;
+	struct mgcp_codec_param param;
 };
 
 struct osmo_fsm_inst *mgcp_conn_create(struct mgcp_client *mgcp, struct osmo_fsm_inst *parent_fi, uint32_t parent_term_evt,