diff --git a/janus/src/rtp.c b/janus/src/rtp.c
index c1eb4c7..17bb6c4 100644
--- a/janus/src/rtp.c
+++ b/janus/src/rtp.c
@@ -47,9 +47,9 @@ void us_rtp_assign(us_rtp_s *rtp, uint payload, bool video) {
 	rtp->ssrc = us_triple_u32(us_get_now_monotonic_u64());
 }
 
-void us_rtp_write_header(us_rtp_s *rtp, u32 pts, bool marked) {
+void us_rtp_write_header(us_rtp_s *rtp, u32 pts, bool last_header) {
 	u32 word0 = 0x80000000;
-	if (marked) {
+	if (last_header) {
 		word0 |= 1 << 23;
 	}
 	word0 |= (rtp->payload & 0x7F) << 16;
diff --git a/janus/src/rtp.h b/janus/src/rtp.h
index 43b2e1f..d49cbaf 100644
--- a/janus/src/rtp.h
+++ b/janus/src/rtp.h
@@ -66,4 +66,4 @@ us_rtp_s *us_rtp_init(void);
 void us_rtp_destroy(us_rtp_s *rtp);
 
 void us_rtp_assign(us_rtp_s *rtp, uint payload, bool video);
-void us_rtp_write_header(us_rtp_s *rtp, u32 pts, bool marked);
+void us_rtp_write_header(us_rtp_s *rtp, u32 pts, bool last_header);