diff --git a/include/osmocom/mgcp/mgcp.h b/include/osmocom/mgcp/mgcp.h
index 7597af8..5886a65 100644
--- a/include/osmocom/mgcp/mgcp.h
+++ b/include/osmocom/mgcp/mgcp.h
@@ -190,6 +190,7 @@
 	/* RTP patching */
 	int force_constant_ssrc; /* 0: don't, 1: once */
 	int force_aligned_timing;
+	bool rfc5993_hr_convert;
 
 	/* spec handling */
 	int force_realloc;
diff --git a/include/osmocom/mgcp/mgcp_internal.h b/include/osmocom/mgcp/mgcp_internal.h
index 14c5f11..a6239c2 100644
--- a/include/osmocom/mgcp/mgcp_internal.h
+++ b/include/osmocom/mgcp/mgcp_internal.h
@@ -128,6 +128,7 @@
 	int force_constant_ssrc; /* -1: always, 0: don't, 1: once */
 	/* should we perform align_rtp_timestamp_offset() (1) or not (0) */
 	int force_aligned_timing;
+	bool rfc5993_hr_convert;
 
 	/* Each end has a separate socket for RTP and RTCP */
 	struct osmo_fd rtp;