diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index e5b0186df4..88d15c3f4e 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -42,12 +42,6 @@ enum RTSPClientState {
     RTSP_STATE_PAUSED,
 };
 
-enum RTSPServerType {
-    RTSP_SERVER_RTP, /*< Standard-compliant RTP-server */
-    RTSP_SERVER_RDT, /*< Realmedia-style server */
-    RTSP_SERVER_LAST
-};
-
 typedef struct RTSPState {
     URLContext *rtsp_hd; /* RTSP TCP connexion handle */
     int nb_rtsp_streams;
@@ -61,7 +55,6 @@ typedef struct RTSPState {
     int seq;        /* RTSP command sequence number */
     char session_id[512];
     enum RTSPProtocol protocol;
-    enum RTSPServerType server_type;
     char last_reply[2048]; /* XXX: allocate ? */
     RTPDemuxContext *cur_rtp;
 } RTSPState;
@@ -717,9 +710,6 @@ void rtsp_parse_line(RTSPHeader *reply, const char *buf)
         reply->seq = strtol(p, NULL, 10);
     } else if (av_stristart(p, "Range:", &p)) {
         rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
-    } else if (av_stristart(p, "RealChallenge1:", &p)) {
-        skip_spaces(&p);
-        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
     }
 }
 
@@ -1045,7 +1035,6 @@ static int rtsp_read_header(AVFormatContext *s,
     RTSPHeader reply1, *reply = &reply1;
     unsigned char *content = NULL;
     int protocol_mask = 0;
-    char real_challenge[64];
 
     /* extract hostname and port */
     url_split(NULL, 0, NULL, 0,
@@ -1084,42 +1073,6 @@ static int rtsp_read_header(AVFormatContext *s,
     rt->rtsp_hd = rtsp_hd;
     rt->seq = 0;
 
-    /* request options supported by the server; this also detects server type */
-    for (rt->server_type = RTSP_SERVER_RTP;;) {
-        snprintf(cmd, sizeof(cmd),
-                 "OPTIONS %s RTSP/1.0\r\n", s->filename);
-        if (rt->server_type == RTSP_SERVER_RDT)
-            av_strlcat(cmd,
-                       /**
-                        * The following entries are required for proper
-                        * streaming from a Realmedia server. They are
-                        * interdependent in some way although we currently
-                        * don't quite understand how. Values were copied
-                        * from mplayer SVN r23589.
-                        * @param CompanyID is a 16-byte ID in base64
-                        * @param ClientChallenge is a 16-byte ID in hex
-                        */
-                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
-                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
-                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
-                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
-                       sizeof(cmd));
-        rtsp_send_cmd(s, cmd, reply, NULL);
-        if (reply->status_code != RTSP_STATUS_OK) {
-            err = AVERROR_INVALIDDATA;
-            goto fail;
-        }
-
-        /* detect server type if not standard-compliant RTP */
-        if (rt->server_type != RTSP_SERVER_RDT && reply->real_challenge[0]) {
-            rt->server_type = RTSP_SERVER_RDT;
-            continue;
-        } else if (rt->server_type == RTSP_SERVER_RDT) {
-            strcpy(real_challenge, reply->real_challenge);
-        }
-        break;
-    }
-
     /* describe the stream */
     snprintf(cmd, sizeof(cmd),
              "DESCRIBE %s RTSP/1.0\r\n"
diff --git a/libavformat/rtsp.h b/libavformat/rtsp.h
index 537d4bf333..288f69776d 100644
--- a/libavformat/rtsp.h
+++ b/libavformat/rtsp.h
@@ -18,8 +18,8 @@
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
-#ifndef AVFORMAT_RTSP_H
-#define AVFORMAT_RTSP_H
+#ifndef FFMPEG_RTSP_H
+#define FFMPEG_RTSP_H
 
 #include <stdint.h>
 #include "avformat.h"
@@ -62,7 +62,6 @@ typedef struct RTSPHeader {
     RTSPTransportField transports[RTSP_MAX_TRANSPORTS];
     int seq; /**< sequence number */
     char session_id[512];
-    char real_challenge[64]; /**< the RealChallenge1 field from the server */
 } RTSPHeader;
 
 /** the callback can be used to extend the connection setup/teardown step */
@@ -95,4 +94,4 @@ extern int rtsp_rtp_port_max;
 int rtsp_pause(AVFormatContext *s);
 int rtsp_resume(AVFormatContext *s);
 
-#endif /* AVFORMAT_RTSP_H */
+#endif /* FFMPEG_RTSP_H */