diff --git a/stream/librtsp/rtsp.h b/stream/librtsp/rtsp.h
index 5252f8de22..f14a9a721c 100644
--- a/stream/librtsp/rtsp.h
+++ b/stream/librtsp/rtsp.h
@@ -47,7 +47,7 @@
 #define RTSP_METHOD_SET_PARAMETER "SET_PARAMETER"
 
 #define BUF_SIZE 4096
-#define HEADER_SIZE 1024
+#define RTSP_HEADER_SIZE 1024
 #define MAX_FIELDS 256
 
 
diff --git a/stream/librtsp/rtsp_session.c b/stream/librtsp/rtsp_session.c
index 33c36f15b9..b1176dbb99 100644
--- a/stream/librtsp/rtsp_session.c
+++ b/stream/librtsp/rtsp_session.c
@@ -175,7 +175,7 @@ rtsp_session_t *rtsp_session_start(int fd, char **mrl, char *path, char *host,
       mp_msg(MSGT_OPEN, MSGL_V, "smil-over-realrtsp playlist, switching to raw rdt mode\n");
     } else {
     rtsp_session->real_session->header_len =
-      rmff_dump_header (h, (char *) rtsp_session->real_session->header, HEADER_SIZE);
+      rmff_dump_header (h, (char *) rtsp_session->real_session->header, RTSP_HEADER_SIZE);
 
       if (rtsp_session->real_session->header_len < 0) {
         mp_msg (MSGT_OPEN, MSGL_ERR,"rtsp_session: error while dumping RMFF headers, session can not be established.\n");
diff --git a/stream/realrtsp/real.h b/stream/realrtsp/real.h
index 40e59c7c23..6cc771b718 100644
--- a/stream/realrtsp/real.h
+++ b/stream/realrtsp/real.h
@@ -33,7 +33,7 @@
 #include "rmff.h"
 #include "stream/librtsp/rtsp.h"
 
-#define HEADER_SIZE 4096
+#define REAL_HEADER_SIZE 4096
 
 struct real_rtsp_session_t {
   /* receive buffer */
@@ -42,7 +42,7 @@ struct real_rtsp_session_t {
   int recv_read;
 
   /* header buffer */
-  uint8_t header[HEADER_SIZE];
+  uint8_t header[REAL_HEADER_SIZE];
   int header_len;
   int header_read;