diff --git a/include/osmocom/mgcp/mgcp_codec.h b/include/osmocom/mgcp/mgcp_codec.h
index 334913b..2bbb86e 100644
--- a/include/osmocom/mgcp/mgcp_codec.h
+++ b/include/osmocom/mgcp/mgcp_codec.h
@@ -2,6 +2,6 @@
 
 void mgcp_codec_summary(struct mgcp_conn_rtp *conn);
 void mgcp_codec_reset_all(struct mgcp_conn_rtp *conn);
-int mgcp_codec_add(struct mgcp_conn_rtp *conn, int payload_type, const char *audio_name);
+int mgcp_codec_add(struct mgcp_conn_rtp *conn, int payload_type, const char *audio_name, struct mgcp_codec_param *param);
 int mgcp_codec_decide(struct mgcp_conn_rtp *conn);
 int mgcp_codec_pt_translate(struct mgcp_conn_rtp *conn_src, struct mgcp_conn_rtp *conn_dst, int payload_type);
diff --git a/include/osmocom/mgcp/mgcp_common.h b/include/osmocom/mgcp/mgcp_common.h
index a658f1c..75d5a37 100644
--- a/include/osmocom/mgcp/mgcp_common.h
+++ b/include/osmocom/mgcp/mgcp_common.h
@@ -57,6 +57,12 @@
 	MGCP_X_OSMO_IGN_CALLID = 1,
 };
 
+/* Codec parameters (communicated via SDP/fmtp) */
+struct mgcp_codec_param {
+	bool amr_octet_aligned_present;
+	bool amr_octet_aligned;
+};
+
 /* Ensure that the msg->l2h is NUL terminated. */
 static inline int mgcp_msg_terminate_nul(struct msgb *msg)
 {
diff --git a/include/osmocom/mgcp/mgcp_internal.h b/include/osmocom/mgcp/mgcp_internal.h
index 35b535a..ec94584 100644
--- a/include/osmocom/mgcp/mgcp_internal.h
+++ b/include/osmocom/mgcp/mgcp_internal.h
@@ -95,6 +95,9 @@
 	int payload_type;
 	char *audio_name;
 	char *subtype_name;
+
+	bool param_present;
+	struct mgcp_codec_param param;
 };
 
 /* 'mgcp_rtp_end': basically a wrapper around the RTP+RTCP ports */