diff --git a/src/rtp/fb.c b/src/rtp/fb.c
index e541034fd..9dd376af9 100644
--- a/src/rtp/fb.c
+++ b/src/rtp/fb.c
@@ -12,7 +12,6 @@
 #include <re_sys.h>
 #include <re_sa.h>
 #include <re_rtp.h>
-#include <re_thread.h>
 #include "rtcp.h"
 
 
diff --git a/src/rtp/member.c b/src/rtp/member.c
index 0d3e6c7ad..1a3bd78e5 100644
--- a/src/rtp/member.c
+++ b/src/rtp/member.c
@@ -12,7 +12,6 @@
 #include <re_hash.h>
 #include <re_sa.h>
 #include <re_rtp.h>
-#include <re_thread.h>
 #include "rtcp.h"
 
 
diff --git a/src/rtp/pkt.c b/src/rtp/pkt.c
index b73abe255..dffb054d1 100644
--- a/src/rtp/pkt.c
+++ b/src/rtp/pkt.c
@@ -12,7 +12,6 @@
 #include <re_sys.h>
 #include <re_sa.h>
 #include <re_rtp.h>
-#include <re_thread.h>
 #include "rtcp.h"
 
 
diff --git a/src/rtp/rr.c b/src/rtp/rr.c
index 3b2bc4ede..9d39de878 100644
--- a/src/rtp/rr.c
+++ b/src/rtp/rr.c
@@ -13,7 +13,6 @@
 #include <re_sys.h>
 #include <re_net.h>
 #include <re_rtp.h>
-#include <re_thread.h>
 #include "rtcp.h"
 
 
diff --git a/src/rtp/rtcp.c b/src/rtp/rtcp.c
index 620e3ab5a..17c3d20fb 100644
--- a/src/rtp/rtcp.c
+++ b/src/rtp/rtcp.c
@@ -11,7 +11,6 @@
 #include <re_list.h>
 #include <re_sa.h>
 #include <re_rtp.h>
-#include <re_thread.h>
 #include "rtcp.h"
 
 
diff --git a/src/rtp/rtcp.h b/src/rtp/rtcp.h
index 17861ff85..d85404866 100644
--- a/src/rtp/rtcp.h
+++ b/src/rtp/rtcp.h
@@ -47,8 +47,6 @@ struct rtp_source {
 	uint32_t last_rtp_ts;     /**< Last RTP timestamp                  */
 	uint32_t psent;           /**< RTP packets sent                    */
 	uint32_t osent;           /**< RTP octets sent                     */
-
-	mtx_t *lock;              /**< Lock for this struct                */
 };
 
 /** RTP Member */
@@ -73,8 +71,6 @@ void source_calc_jitter(struct rtp_source *s, uint32_t rtp_ts,
 			uint32_t arrival);
 int  source_calc_lost(const struct rtp_source *s);
 uint8_t source_calc_fraction_lost(struct rtp_source *s);
-int source_lock(struct rtp_source *s);
-int source_unlock(struct rtp_source *s);
 
 /* RR (Reception report) */
 int rtcp_rr_alloc(struct rtcp_rr **rrp, size_t count);
diff --git a/src/rtp/rtp.c b/src/rtp/rtp.c
index 16b87ff11..76d73cf5f 100644
--- a/src/rtp/rtp.c
+++ b/src/rtp/rtp.c
@@ -13,7 +13,6 @@
 #include <re_sys.h>
 #include <re_net.h>
 #include <re_udp.h>
-#include <re_thread.h>
 #include <re_rtp.h>
 #include <re_atomic.h>
 #include "rtcp.h"
diff --git a/src/rtp/sdes.c b/src/rtp/sdes.c
index b7bb7eb88..711d8a908 100644
--- a/src/rtp/sdes.c
+++ b/src/rtp/sdes.c
@@ -11,7 +11,6 @@
 #include <re_list.h>
 #include <re_sa.h>
 #include <re_rtp.h>
-#include <re_thread.h>
 #include "rtcp.h"
 
 
diff --git a/src/rtp/sess.c b/src/rtp/sess.c
index 9aa832f33..4d03ae0a8 100644
--- a/src/rtp/sess.c
+++ b/src/rtp/sess.c
@@ -56,9 +56,9 @@ struct rtcp_sess {
 	uint32_t srate_tx;          /**< Transmit sampling rate              */
 	uint32_t srate_rx;          /**< Receive sampling rate               */
 	uint32_t interval;          /**< RTCP interval in [ms]               */
+	mtx_t *lock;                /**< Lock for rtcp_sess                  */
 
 	/* stats */
-	mtx_t *lock;                /**< Lock for txstat                     */
 	struct txstat txstat;       /**< Local transmit statistics           */
 };
 
@@ -84,14 +84,6 @@ static void sess_destructor(void *data)
 }
 
 
-static void source_destructor(void *data)
-{
-	struct rtp_source *s = data;
-
-	mem_deref(s->lock);
-}
-
-
 static struct rtp_member *get_member(struct rtcp_sess *sess, uint32_t src)
 {
 	struct rtp_member *mbr;
@@ -186,7 +178,6 @@ static void handle_incoming_sr(struct rtcp_sess *sess,
 
 	if (mbr->s) {
 		/* Save time when SR was received */
-		source_lock(mbr->s);
 		mbr->s->sr_recv = tmr_jiffies();
 
 		/* Save NTP timestamp from SR */
@@ -195,7 +186,6 @@ static void handle_incoming_sr(struct rtcp_sess *sess,
 		mbr->s->rtp_ts     = msg->r.sr.rtp_ts;
 		mbr->s->psent      = msg->r.sr.psent;
 		mbr->s->osent      = msg->r.sr.osent;
-		source_unlock(mbr->s);
 	}
 
 	for (i=0; i<msg->hdr.count; i++)
@@ -229,6 +219,7 @@ void rtcp_handler(struct rtcp_sess *sess, struct rtcp_msg *msg)
 	if (!sess || !msg)
 		return;
 
+	mtx_lock(sess->lock);
 	switch (msg->hdr.pt) {
 
 	case RTCP_SR:
@@ -246,6 +237,8 @@ void rtcp_handler(struct rtcp_sess *sess, struct rtcp_msg *msg)
 	default:
 		break;
 	}
+
+	mtx_unlock(sess->lock);
 }
 
 
@@ -357,8 +350,10 @@ int rtcp_enable(struct rtcp_sess *sess, bool enabled, const char *cname)
 	if (!sess)
 		return EINVAL;
 
+	mtx_lock(sess->lock);
 	sess->cname = mem_deref(sess->cname);
 	err = str_dup(&sess->cname, cname);
+	mtx_unlock(sess->lock);
 	if (err)
 		return err;
 
@@ -402,14 +397,12 @@ static bool sender_apply_handler(struct le *le, void *arg)
 
 	/* Initialise the members */
 	rr.ssrc     = mbr->src;
-	source_lock(s);
 	rr.fraction = source_calc_fraction_lost(s);
 	rr.lost     = source_calc_lost(s);
 	rr.last_seq = s->cycles | s->max_seq;
 	rr.jitter   = s->jitter >> 4;
 	rr.lsr      = calc_lsr(&s->last_sr);
 	rr.dlsr     = calc_dlsr(s->sr_recv);
-	source_unlock(s);
 
 	return 0 != rtcp_rr_encode(mb, &rr);
 }
@@ -583,38 +576,28 @@ void rtcp_sess_rx_rtp(struct rtcp_sess *sess, struct rtp_header *hdr,
 	if (!sess)
 		return;
 
+	mtx_lock(sess->lock);
 	mbr = get_member(sess, hdr->ssrc);
 	if (!mbr) {
 		DEBUG_NOTICE("could not add member: 0x%08x\n", hdr->ssrc);
-		return;
+		goto out;
 	}
 
 	if (!mbr->s) {
-		int err;
-
-		mbr->s = mem_zalloc(sizeof(*mbr->s), source_destructor);
-		if (!mbr->s)
-			err = ENOMEM;
-		else
-			err = mutex_alloc(&mbr->s->lock);
-
-		if (err) {
+		mbr->s = mem_zalloc(sizeof(*mbr->s), NULL);
+		if (!mbr->s) {
 			DEBUG_NOTICE("could not add sender: 0x%08x\n",
 				     hdr->ssrc);
-			mbr->s = mem_deref(mbr->s);
-			return;
+			goto out;
 		}
 
 		/* first packet - init sequence number */
-		source_lock(mbr->s);
 		source_init_seq(mbr->s, hdr->seq);
 		/* probation not used */
 		sa_cpy(&mbr->s->rtp_peer, peer);
-		source_unlock(mbr->s);
 		++sess->senderc;
 	}
 
-	source_lock(mbr->s);
 	if (!source_update_seq(mbr->s, hdr->seq)) {
 		DEBUG_WARNING("rtp_update_seq() returned 0\n");
 	}
@@ -635,7 +618,8 @@ void rtcp_sess_rx_rtp(struct rtcp_sess *sess, struct rtp_header *hdr,
 
 	mbr->s->last_rtp_ts = hdr->ts;
 	mbr->s->rtp_rx_bytes += payload_size;
-	source_unlock(mbr->s);
+out:
+	mtx_unlock(sess->lock);
 }
 
 
@@ -652,17 +636,19 @@ int rtcp_stats(struct rtp_sock *rs, uint32_t ssrc, struct rtcp_stats *stats)
 {
 	const struct rtcp_sess *sess = rtp_rtcp_sess(rs);
 	struct rtp_member *mbr;
+	int err = 0;
 
 	if (!sess || !stats)
 		return EINVAL;
 
+	mtx_lock(sess->lock);
 	mbr = member_find(sess->members, ssrc);
-	if (!mbr)
-		return ENOENT;
+	if (!mbr) {
+		err = ENOENT;
+		goto out;
+	}
 
-	mtx_lock(sess->lock);
 	stats->tx.sent = sess->txstat.psent;
-	mtx_unlock(sess->lock);
 
 	stats->tx.lost = mbr->cum_lost;
 	stats->tx.jit  = mbr->jit;
@@ -671,52 +657,36 @@ int rtcp_stats(struct rtp_sock *rs, uint32_t ssrc, struct rtcp_stats *stats)
 
 	if (!mbr->s) {
 		memset(&stats->rx, 0, sizeof(stats->rx));
-		return 0;
+		goto out;
 	}
 
-	source_lock(mbr->s);
 	stats->rx.sent = mbr->s->received;
 	stats->rx.lost = source_calc_lost(mbr->s);
 	stats->rx.jit  = sess->srate_rx ?
 		1000000 * (mbr->s->jitter>>4) / sess->srate_rx : 0;
-	source_unlock(mbr->s);
 
-	return 0;
+out:
+	mtx_unlock(sess->lock);
+	return err;
 }
 
 
 static bool debug_handler(struct le *le, void *arg)
 {
 	const struct rtp_member *mbr = le->data;
-	struct re_printf *pf = arg;
-	struct mbuf *mb = NULL;
+	struct mbuf *mb = arg;
 	int err;
 
-	err = re_hprintf(pf, "  member 0x%08x: lost=%d Jitter=%.1fms"
+	err = mbuf_printf(mb, "  member 0x%08x: lost=%d Jitter=%.1fms"
 			  " RTT=%.1fms\n", mbr->src, mbr->cum_lost,
 			  (double)mbr->jit/1000, (double)mbr->rtt/1000);
-	if (err)
-		return true;
-
 	if (mbr->s) {
-		mb = mbuf_alloc(64);
-		if (!mb)
-			return true;
-
-		source_lock(mbr->s);
-		err = mbuf_printf(mb,
-				  "                 IP=%J psent=%u rcvd=%u\n",
-				  &mbr->s->rtp_peer, mbr->s->psent,
-				  mbr->s->received);
-		source_unlock(mbr->s);
-		if (err)
-			goto out;
-
-		re_hprintf(pf, "%b", mb->buf, mb->pos);
+		err |= mbuf_printf(mb,
+				   "                 IP=%J psent=%u rcvd=%u\n",
+				   &mbr->s->rtp_peer, mbr->s->psent,
+				   mbr->s->received);
 	}
 
-out:
-	mem_deref(mb);
 	return err != 0;
 }
 
@@ -732,23 +702,35 @@ static bool debug_handler(struct le *le, void *arg)
 int rtcp_debug(struct re_printf *pf, const struct rtp_sock *rs)
 {
 	const struct rtcp_sess *sess = rtp_rtcp_sess(rs);
+	struct mbuf *mb;
 	int err = 0;
 
 	if (!sess)
 		return 0;
 
-	err |= re_hprintf(pf, "----- RTCP Session: -----\n");
-	err |= re_hprintf(pf, "  cname=%s SSRC=0x%08x/%u rx=%uHz\n",
+	mb = mbuf_alloc(64);
+	if (!mb)
+		return ENOMEM;
+
+	err |= mbuf_printf(mb, "----- RTCP Session: -----\n");
+	mtx_lock(sess->lock);
+	err |= mbuf_printf(mb, "  cname=%s SSRC=0x%08x/%u rx=%uHz\n",
 			  sess->cname,
 			  rtp_sess_ssrc(sess->rs), rtp_sess_ssrc(sess->rs),
 			  sess->srate_rx);
 
-	hash_apply(sess->members, debug_handler, pf);
+	hash_apply(sess->members, debug_handler, mb);
 
-	mtx_lock(sess->lock);
-	err |= re_hprintf(pf, "  TX: packets=%u, octets=%u\n",
+	err |= mbuf_printf(mb, "  TX: packets=%u, octets=%u\n",
 			  sess->txstat.psent, sess->txstat.osent);
 	mtx_unlock(sess->lock);
 
+	if (err)
+		goto out;
+
+	err = re_hprintf(pf, "%b", mb->buf, mb->pos);
+
+out:
+	mem_deref(mb);
 	return err;
 }
diff --git a/src/rtp/source.c b/src/rtp/source.c
index 996623242..c6a324229 100644
--- a/src/rtp/source.c
+++ b/src/rtp/source.c
@@ -11,7 +11,6 @@
 #include <re_list.h>
 #include <re_hash.h>
 #include <re_sa.h>
-#include <re_thread.h>
 #include <re_rtp.h>
 #include "rtcp.h"
 
@@ -176,15 +175,3 @@ uint8_t source_calc_fraction_lost(struct rtp_source *s)
 
 	return fraction;
 }
-
-
-int source_lock(struct rtp_source *s)
-{
-	return mtx_lock(s->lock);
-}
-
-
-int source_unlock(struct rtp_source *s)
-{
-	return mtx_unlock(s->lock);
-}