diff --git a/src/modules/module-rtp-sink.c b/src/modules/module-rtp-sink.c
index ef9e1e3b4..7abd4d531 100644
--- a/src/modules/module-rtp-sink.c
+++ b/src/modules/module-rtp-sink.c
@@ -487,6 +487,7 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
 	const char *str, *sess_name;
 	int64_t ts_offset;
 	int res = 0;
+	uint32_t header_size;
 
 	PW_LOG_TOPIC_INIT(mod_topic);
 
@@ -584,6 +585,10 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
 		ts_offset = pw_rand32();
 	pw_properties_setf(stream_props, "rtp.sender-ts-offset", "%u", (uint32_t)ts_offset);
 
+	header_size = impl->dst_addr.ss_family == AF_INET ?
+                        IP4_HEADER_SIZE : IP6_HEADER_SIZE;
+	header_size += UDP_HEADER_SIZE;
+	pw_properties_setf(stream_props, "net.header", "%u", header_size);
 	pw_net_get_ip(&impl->src_addr, addr, sizeof(addr), NULL, NULL);
 	pw_properties_set(stream_props, "rtp.source.ip", addr);
 	pw_net_get_ip(&impl->dst_addr, addr, sizeof(addr), NULL, NULL);
diff --git a/src/modules/module-rtp-source.c b/src/modules/module-rtp-source.c
index 2d134e329..f9a3f3345 100644
--- a/src/modules/module-rtp-source.c
+++ b/src/modules/module-rtp-source.c
@@ -564,6 +564,7 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
 	int64_t ts_offset;
 	char addr[128];
 	int res = 0;
+	uint32_t header_size;
 
 	PW_LOG_TOPIC_INIT(mod_topic);
 
@@ -644,6 +645,11 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
 	pw_properties_set(stream_props, "rtp.source.ip", addr);
 	pw_properties_setf(stream_props, "rtp.source.port", "%u", impl->src_port);
 
+	header_size = impl->src_addr.ss_family == AF_INET ?
+                        IP4_HEADER_SIZE : IP6_HEADER_SIZE;
+	header_size += UDP_HEADER_SIZE;
+	pw_properties_setf(stream_props, "net.header", "%u", header_size);
+
 	ts_offset = pw_properties_get_int64(props, "sess.ts-offset", DEFAULT_TS_OFFSET);
 	if (ts_offset == -1)
 		ts_offset = pw_rand32();
diff --git a/src/modules/module-rtp/stream.c b/src/modules/module-rtp/stream.c
index 63b4f2119..74da31f74 100644
--- a/src/modules/module-rtp/stream.c
+++ b/src/modules/module-rtp/stream.c
@@ -71,6 +71,7 @@ struct impl {
 	uint32_t ts_offset;
 	uint32_t psamples;
 	uint32_t mtu;
+	uint32_t header_size;
 	uint32_t payload_size;
 
 	struct spa_ringbuffer ring;
@@ -442,11 +443,14 @@ struct rtp_stream *rtp_stream_new(struct pw_core *core,
 
 	impl->payload = pw_properties_get_uint32(props, "rtp.payload", impl->payload);
 	impl->mtu = pw_properties_get_uint32(props, "net.mtu", DEFAULT_MTU);
-	if (impl->mtu <= PACKET_HEADER_SIZE) {
+	impl->header_size = pw_properties_get_uint32(props, "net.header", IP4_HEADER_SIZE + UDP_HEADER_SIZE);
+	impl->header_size += RTP_HEADER_SIZE;
+
+	if (impl->mtu <= impl->header_size) {
 		pw_log_error("invalid MTU %d, using %d", impl->mtu, DEFAULT_MTU);
 		impl->mtu = DEFAULT_MTU;
 	}
-	impl->payload_size = impl->mtu - PACKET_HEADER_SIZE;
+	impl->payload_size = impl->mtu - impl->header_size;
 
 	impl->seq = pw_rand32();
 
diff --git a/src/modules/module-rtp/stream.h b/src/modules/module-rtp/stream.h
index 2594e804a..83cf0da34 100644
--- a/src/modules/module-rtp/stream.h
+++ b/src/modules/module-rtp/stream.h
@@ -19,8 +19,11 @@ struct rtp_stream;
 #define ERROR_MSEC		2.0f
 #define DEFAULT_SESS_LATENCY	100.0f
 
-/* 28 bytes IP/UDP, 12 bytes RTP header */
-#define PACKET_HEADER_SIZE	(12+28)
+#define IP4_HEADER_SIZE		20
+#define IP6_HEADER_SIZE		40
+#define UDP_HEADER_SIZE		8
+/* 12 bytes RTP header */
+#define RTP_HEADER_SIZE		12
 
 #define DEFAULT_MTU		1280
 #define DEFAULT_MIN_PTIME	2.0f